1-finger taps not working at all

BTT 3.562 on a 2020 MacBook Pro running Catalina 10.15.7

left and right taps (instead of clicks) are not working at all. I restart BTT, the taps work for a moment, in Finder only, and then as soon as I go to another programme (or sometimes just after a few seconds) they stop working.

Is there a software conflict? Can't think what it is.

Note: Before bug reporting, please make sure you have tried the latest (alpha) version of BetterTouchTool and that you have already tried to restart your system :-). If you encounter a crash, please attach a crash log from the macOS Console.app from the "User Diagnostic Reports" section.

Describe the bug
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Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):

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Device information:

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  • BetterTouchTool version: (please post the exact version - not just "the latest one")

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