Merge pull request #4688 from Textualize/fix-mouse-over

fix mouse flicker

Author: willmcgugan

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixed grid + keyline when the grid has auto dimensions https://github.com/Textualize/textual/pull/4680
 - Fixed mouse code leakage https://github.com/Textualize/textual/pull/4681
 - Fixed link inside markdown table not posting a `Markdown.LinkClicked` message https://github.com/Textualize/textual/issues/4683
+- Fixed issue with mouse movements on non-active screen https://github.com/Textualize/textual/pull/4688
 
 
 ## [0.70.0] - 2024-06-19

src/textual/app.py

@@ -2319,7 +2319,7 @@ def _update_mouse_over(self, screen: Screen) -> None:
 
         """
 
-        if self.mouse_over is None:
+        if self.mouse_over is None or not screen.is_active:
             return
 
         async def check_mouse() -> None: