I'm having mouse lag also, immediately after upgrading to 24H2. The mouse pauses, then suddenly takes a jackrabbit launch to catch up to where the pointer should be.
Initially I saw it as tied to the Citrix Workspace client as well but that's definitely not the case because it's the same behavior without Citrix published apps running.
Scenarios ruled out because mouse latency is also present on my laptop as a single display with any external mouse:
- DisplayLink dock with 6 4K displays: eliminated
- Citrix Workspace client: eliminated
- Teams running while sharing a display: eliminated
- Having Visual Studio running: eliminated
The impact is so severe that if it's present on my other laptop, I'm left doing a Windows reinstall & setting local policies to lock in 23H2. I thought perhaps it's DisplayLink related, but not because I've experienced it when using the laptop by itself (I run quad 4K displays on a DisplayLink dock)
Local policy blocking 24H2: Policy setting
I am using a combination of Bluetooth & wired mice.
I have an Asus ProArt (borders on unusable with external displays because of 24H2's mouse latency), a really old Surface Book with Win 10 & a Studio Laptop to run the same tests against.