BTT causes laggy scrolling / keyboard input on Big Sur

Describe the bug
A clear and concise description of what the bug is.
I frequently have to restart or just plain quit BTT because when using my magic keyboard and Touch Bar (with a USB C monitor plugged in, if that helps) because my scrolling and typing just gets too laggy to continue using.

I don't notice any weird CPU usage issues like other posts with this issue have. Restarting BTT helps, but not always.

I notice the lag the most in Chrome and on VSCode

Device information:

  • Type of Mac: 16 inch MacBook Pro (2019)
  • macOS version: 11.1
  • BetterTouchTool version: (please post the exact version - not just "the latest one"):
    Updated to alpha 3.551 in hopes that it would solve the problem

I fixed this issue by disabling Dropbox Syncing, as suggested in another thread. No problems since doing that

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