In Play Solo my mouse has a second mouse underneath it that lags behind. When I change the mouse cursor it quickly flashes between different positions. In the editor my mouse is constantly going between the pointer icon and the input-bar-thing icon.
This all started during this release. This happens both with and without HardwareMouse.
Was about to report these, even created gifs for the two issues:
(For the double cursor one both the cursors are the same size, but for some reason one of them got sized down during recording).
May have to do something with the dev console’s replacement cursor?
EDIT: Actually can’t be the case here, nvm
This should be fixed soon. Sorry about that!
Wayyy later, but I’m still having this issue quite alot
In my recently made places my mouse seems to be lagging behind and not registering when I play test the game, could this be because of the new Roblox Studio update or just me? (This only happens when I make my place public in studio).
I’m also just having this issue? I have to hold click on my mouse to make it move which is very strange? (See thread Mouse occasionally breaks and doesn't update properly - #6 by Nizkio)
Also having this issue. The roblox cursor is desynced from the OS mouse, and both appear seperately (latter should be hidden). The roblox mouse only updates on clicking. This is true for studio and playtesting, not sure of the player. Breaks selection boxes, mouse.Hit, and basically every other function/property related to the mouse object.
I’m also having this issue. A very infuriating one.
I’m guessing ever since the new Release Note (610), I’ve had this issue 
That was a lie.
Also having this issue! I thought having two cursors would double my efficiency but it has actually lowered it quite significantly! How could this possibly happen!?
Recently, this problem has become more frequent, and I have dealt with it by restarting Studio each time, but I am surprised that the cause was not due to my environment.
Although not directly related to this problem, the viewpoints also started to show up around the same time when the wheel is clicked.
The bug was likely actually fixed when he said that. 8 years later, it may have reappeared in a different way.
Could somebody provide a video on what this bug looks like?
Yeah, I’ve been having this bug since the latest release note (610) as well.
I’ve also been experiencing this bug these days. The only thing capable of fixing it is just reopening roblox studio.
It doesn’t happen when i open the place and/or playtest it, but when i close it and open it again (or open another one) the bug appears, it’s pretty annoying. 
Here’s a quite long video presenting the behavior of said bug.
This is a video recording of a bug in moving the viewpoint by wheel-clicking and dragging with the mouse.
Normally, the cursor should start moving from the current viewpoint, regardless of where the cursor is, but the moment the wheel is clicked, the viewpoint is sent to an unexpected location. As a result, the viewpoint cannot be moved correctly.
My mouse is lagging behind in roblox studio which ruins the test of GUIs
Can confirm this is still happening again. This requires studio to be restarted to maybe fix it. This should be a higher priority issue than it is right now tbh.
This is also happening to me in studio, double mouse, unable to rotate camera (started happening when I turned on first person lock). The same exact thing just happened to me a few days ago out of studio as well, inside of a first-person locked game, except there wasn’t a double cursor, but the same exact camera issue happened as it does in studio.
I’ve been having this problem on Studio on macOS for the last several days and it’s very annoying. Happens every day without fail and I keep having to restart studio just to resolve it.
Please fix this already.