Control+shift+arrow select stops working

[Microsoft Windows]

Edition Windows 11 Pro Version 24H2 OS build 26100.2033 Experience Windows Feature Experience Pack 1000.26100.23.0 Somewhat randomly, my Control+Shift+Left or Right Arrow select stops working. I'm a developer, and I use the keyboard to select multiple words at a time all day. It's beyond frustrating. I booted my PC this morning and is was fine, now after about 20 minutes it's no longer working.Is there some keyboard setting that toggle this on or off or overrides it?

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