I’ve recently noticed the Brush preview sometimes gets stuck on the canvas and does not follow the mouse on MacOS with M1 Pro chip.
Here is a link to a screen recording:
Brush Preview doesn’t follow Mouse Cursor
Update: I’ve noticed this only happens when using my Logitech MX mouse. It does not appear to happen with the laptop trackpad.
Aseprite version: v1.3.2-arm64
MacOS: 14.2.1 (23C71)
I’m having a similar issue. sometimes the strokes will either “stick” to the pixel grid and either appear invisible or/and off-cursor until i release the left click and downright “ignore” some pixels.
Keep in mind I only released the left mouse click between shapes. as you can see, sometimes the cursor won’t fill certain areas it passes through, sometimes twice.
I’m using a Logitech MX mouse too on the latest macOS, so it might indeed have something to do with that.
Don’t think I’ve experienced this before.
EDIT: The only solution I found was to reset my preferences.
You’re a wizard!
That worked. Resetting the preferences. Thank you very much.
Hi there! 
this bug is quite strange, taking note just in case, I think @Gasparoken has a logitech MX mouse to test but I’m not 100% sure.
I have created this issue: Brush preview/cursor stops following mouse cursor on macOS · Issue #4329 · aseprite/aseprite · GitHub
Anyway it looks like the window is losing the focus, is a third-party extension/driver handling the logitech mx input? (like a software to customize their buttons etc.)
It could be! I am using the Logi Options+ app. Not sure of the inner workings of the app, so it could very well be accompanied by a driver
I just want to add, i’ve resetted the preferences, but the bug did come back after a while 
An user confirmed the issue is related with the the ‘Flow’ feature on ‘Logi Options’. But I want to be sure: Do you have the Flow feature enabled? If yes, turn it off. This seems like a Logitec software issue rather than a seprite issue.