diff --git a/src/solidlsp/language_servers/csharp_language_server.py b/src/solidlsp/language_servers/csharp_language_server.py
index 9a19bf3a..a0d5408d 100644
--- a/src/solidlsp/language_servers/csharp_language_server.py
+++ b/src/solidlsp/language_servers/csharp_language_server.py
@@ -13,7 +13,6 @@ import threading
 import urllib.request
 import zipfile
 from pathlib import Path
-from time import sleep
 from typing import cast
 
 from overrides import override
@@ -22,7 +21,6 @@ from solidlsp.ls import SolidLanguageServer
 from solidlsp.ls_config import LanguageServerConfig
 from solidlsp.ls_exceptions import SolidLSPException
 from solidlsp.ls_logger import LanguageServerLogger
-from solidlsp.ls_types import Location
 from solidlsp.ls_utils import PathUtils
 from solidlsp.lsp_protocol_handler.lsp_types import InitializeParams
 from solidlsp.lsp_protocol_handler.server import ProcessLaunchInfo
@@ -739,8 +737,5 @@ class CSharpLanguageServer(SolidLanguageServer):
             self.logger.log(f"Opened project files: {project_files}", logging.DEBUG)
 
     @override
-    def request_references(self, relative_file_path: str, line: int, column: int) -> list[Location]:
-        # Like in the typescript LS, we need to wait here for the language server to
-        # get correct results that include cross-file references.
-        sleep(2)
-        return super().request_references(relative_file_path, line, column)
+    def _get_wait_time_for_cross_file_referencing(self) -> float:
+        return 1
diff --git a/src/solidlsp/language_servers/typescript_language_server.py b/src/solidlsp/language_servers/typescript_language_server.py
index ccb5e8c4..361d7284 100644
--- a/src/solidlsp/language_servers/typescript_language_server.py
+++ b/src/solidlsp/language_servers/typescript_language_server.py
@@ -7,7 +7,6 @@ import os
 import pathlib
 import shutil
 import threading
-from time import sleep
 
 from overrides import override
 from sensai.util.logging import LogTime
@@ -250,12 +249,5 @@ class TypeScriptLanguageServer(SolidLanguageServer):
         self.completions_available.set()
 
     @override
-    # For some reason, the LS may need longer to process this, so we just retry
-    def _send_references_request(self, relative_file_path: str, line: int, column: int):
-        # TODO: The LS doesn't return references contained in other files if it doesn't sleep. This is
-        #   despite the LS having processed requests already. I don't know what causes this, but sleeping
-        #   one second helps. It may be that sleeping only once is enough but that's hard to reliably test.
-        #   It may be that even this 1sec is not enough in larger TS projects, at some point we should find what
-        #   causes this and solve it.
-        sleep(1)
-        return super()._send_references_request(relative_file_path, line, column)
+    def _get_wait_time_for_cross_file_referencing(self) -> float:
+        return 1
diff --git a/src/solidlsp/language_servers/vts_language_server.py b/src/solidlsp/language_servers/vts_language_server.py
index c8596b89..b07e4c29 100644
--- a/src/solidlsp/language_servers/vts_language_server.py
+++ b/src/solidlsp/language_servers/vts_language_server.py
@@ -9,7 +9,6 @@ import os
 import pathlib
 import shutil
 import threading
-from time import sleep
 
 from overrides import override
 
@@ -231,8 +230,6 @@ class VtsLanguageServer(SolidLanguageServer):
             self.server_ready.set()
         self.completions_available.set()
 
-    # VTS may need longer to process references, so we include a sleep similar to TypeScript LS
     @override
-    def _send_references_request(self, relative_file_path: str, line: int, column: int):
-        sleep(1)
-        return super()._send_references_request(relative_file_path, line, column)
+    def _get_wait_time_for_cross_file_referencing(self) -> float:
+        return 1
diff --git a/src/solidlsp/ls.py b/src/solidlsp/ls.py
index f4ff544f..9b888029 100644
--- a/src/solidlsp/ls.py
+++ b/src/solidlsp/ls.py
@@ -14,6 +14,7 @@ from collections.abc import Iterator
 from contextlib import contextmanager
 from copy import copy
 from pathlib import Path, PurePath
+from time import sleep
 from typing import Self, Union, cast
 
 import pathspec
@@ -323,6 +324,16 @@ class SolidLanguageServer(ABC):
         self._server_context = None
         self._request_timeout: float | None = None
 
+        self._has_waited_for_cross_file_references = False
+
+    def _get_wait_time_for_cross_file_referencing(self) -> float:
+        """Meant to be overridden by subclasses for LS that don't have a reliable "finished initializing" signal.
+
+        LS may return incomplete results on calls to `request_references` (only references found in the same file),
+        if the LS is not fully initialized yet.
+        """
+        return 0
+
     def set_request_timeout(self, timeout: float | None) -> None:
         """
         :param timeout: the timeout, in seconds, for requests to the language server.
@@ -699,6 +710,12 @@ class SolidLanguageServer(ABC):
             )
             raise SolidLSPException("Language Server not started")
 
+        if not self._has_waited_for_cross_file_references:
+            # Some LS require waiting for a while before they can return cross-file references.
+            # This is a workaround for such LS that don't have a reliable "finished initializing" signal.
+            sleep(self._get_wait_time_for_cross_file_referencing())
+            self._has_waited_for_cross_file_references = True
+
         with self.open_file(relative_file_path):
             try:
                 response = self._send_references_request(relative_file_path, line=line, column=column)
diff --git a/test/solidlsp/csharp/test_csharp_basic.py b/test/solidlsp/csharp/test_csharp_basic.py
index a0c83a13..d4bbd8f1 100644
--- a/test/solidlsp/csharp/test_csharp_basic.py
+++ b/test/solidlsp/csharp/test_csharp_basic.py
@@ -1,6 +1,7 @@
 import os
 import tempfile
 from pathlib import Path
+from typing import cast
 from unittest.mock import Mock, patch
 
 import pytest
@@ -110,16 +111,20 @@ class TestCSharpLanguageServer:
         refs = language_server.request_references(file_path, sel_start["line"], sel_start["character"] + 1)
 
         # Should find references in both Program.cs and Models/Person.cs
-        ref_files = [ref.get("relativePath", "") for ref in refs]
+        ref_files = cast(list[str], [ref.get("relativePath", "") for ref in refs])
         print(f"Found references: {refs}")
         print(f"Reference files: {ref_files}")
 
         # Check that we have references from both files
         assert any("Program.cs" in ref_file for ref_file in ref_files), "Should find reference in Program.cs"
         assert any(
-            "Models/Person.cs" in ref_file for ref_file in ref_files
+            os.path.join("Models", "Person.cs") in ref_file for ref_file in ref_files
         ), "Should find reference in Models/Person.cs where Calculator.Subtract is called"
 
+        # check for a second time, since the first call may trigger initialization and change the state of the LS
+        refs_second_call = language_server.request_references(file_path, sel_start["line"], sel_start["character"] + 1)
+        assert refs_second_call == refs, "Second call to request_references should return the same results"
+
 
 @pytest.mark.csharp
 class TestCSharpSolutionProjectOpening: