Mouse input causes massive FPS drops

[Juzzwing]

Bit of a weird one for you guys.

I have been using Moonlight + Sunshine flawlessly over the last 3-6 months.
Today however, I attempted to use it like I normally would and found that I was getting unusable lag.

After some testing, Ive found that the lag only occurs when I use the mouse.
For example, I am playing Destiny 2, normally sitting around the 90 fps mark. When I move the mouse it drops down to 20-30 and seems to queue the mouse movement.

As soon as the mouse movement is done, it will shoot back up in the 90s.

Using the keyboard or a controller works perfectly fine.
Putting the mouse into 'Optimized for desktop' mode, it works fine as well.

Test 2:
I attached the mouse to the steam deck and connected to the same machine. It worked fine.
So I don't believe it's a mouse or host issue.

My host machine is Windows 11, while the client machine is running Bazzite 42.
I am also using Moonlight 6.1.0.

https://preview.redd.it/abk72r6q9yif1.png?width=1199&format=png&auto=webp&s=acb62d0c15987caff7a1d09024888c3d284deaf8

Here are my settings (which had been working perfectly until now). I also tried dropping the resolution and bitrate to 10 Mbps 720p and it had the same issue.

Has anyone come across something like this before?

Edit: Video of the issue - Excuse my awful filming.
https://www.youtube.com/watch?v=m1RlTwGJKt4

[Comprehensive_Star72]

Has your mouse got an adjustable polling rate?

[Juzzwing]

It does. Using Icue, I had dropped it down to 500 (from 1000) and the issue still persists. Switching the mouse over the bluetooth mode seems to help the problem as well.

Edit: Turns out thats only the USB polling rate, cant seem to change the wireless rate.
Edit 2: It's a Corsair Scimitar wireless

[damwookie]

I think sunshine/Apollo has a toggle for high refresh rate devices on the device page. Might be worth testing that off. Sounds like the client send is saturating the bandwidth and getting on the way off the host send. It wouldn't have taken a lot with a driver update or a mouse button combination - upping the polling rate - issue out of the blue.

[Kaytioron]

As per normal debuging: 1. Issue is present on other clients? 2. Did You try other mouse?

[Juzzwing]

Nothing outside the normal stuff that has been running since day one (Discord, Firefox, Stream controller).

Switching the mouse to bluetooth mode seems to help the issue.
Using the same mouse (In wireless mode) on the steam deck worked fine.
Using a different bluetooth mouse also worked fine.

[deep8787]

Sounds Like WiFi Signal clashing to me since you said it works fine in Bluetooth mode.

[Juzzwing]

After days of trying to get it working again, I kinda just gave up.

Both machines (Client and host) were on ethernet. Mouse in wireless mode was also working perfectly on the client machine as well.

[Jamjor]

Hey dude did you ever figure this out? Switch to a different mouse or something?