In which app are you trying to zoom? Have you tried to delete the zoom scroll modifier and add it again with default settings?
I just confirmed with my MX Master 4 in the Preview app that this is generally still working
@ravebcn if you can reproduce this, best enable the detailed logging via this terminal command:
osascript -e 'tell application "BetterTouchTool" to set_user_defaults key "BTTLogitechDebugEnabled" numberValue 2'
Then reproduce the issue and if it happens again send the logs from this folder to me (andreas@folivora.ai). ~/Library/Application Support/BetterTouchTool/Logs (go there via Finder => Go => Go to Folder, make sure to include the ~). Is your mouse connected via bluetooth or receiver?
@velikistreber just to be sure, the direction BTT shows might not always be correct (depending on the system settings) - scroll right might actually require a Scroll Left.
If that however doesn't change anything - do you have any apps that could still conflict with BTT? Steer Mouse for example is known for breaking scroll triggering with BTT.
I try always in both directions left or right, but doesn’t work. I have previously deleted Better mouse, tried to install Logi Opti+, then uninstall it with Terminal “sudo …”
dongle! I have enabled the command and I will send the registry if it appears again. Thanks
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@velikistreber could you post the output of this? It would show if another app is intercepting scroll events:
SystemEvents.txt (4.9 KB)
Unfortunately all good in there, BTT should definitely receive the scroll events then. 
Unless there is a problem with the Accessibility permissions, but usually that would show an error. I'm currently a bit out of ideas :-/
Hi @Andreas_Hegenberg I have just sent you the log. It happened again after a normal suspension of my Mac.
Based on your log I added some extra code that hopefully helps with this scenario in 6.090! (Uploading)
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Workaround at least for “Scroll modifier” : no one mouse need to be selected
Scroll left / right still doesn't work. But has a negative impact to the Trackpad (scroll recognized as Zoom)
That's interesting! Could you go to Help => Export Diagnostic Debug Information and send the result to me? (andreas@folivora.ai)
I believe maybe something that has been deleted is still interfering, possibly a database problem.
Legend! I can confirm it works, thanks a lot!
Amazing thanks. It’s amazing how quick you are…
@velikistreber unfortunately I still wasn't able to reproduce this here. However I have added some more safe guards with 6.092 (uploading now) - could you check whether that helps?
If zooming still fails, could you try to uncheck and then check again this setting in system settings (that resets any state issues):
Hey Andreas, can confirm this is now fixed - thanks so much!
Hi Andreas, with 6.092 works everything (without any workaround). Thanks for your support.
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I today got a MX Vertical and did some testing, but could not find any issues, could you try whether you still encounter this with 6.093?
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Sometimes you’ll have to show us your work environment. You must have dozens of different mice around you, testing every little detail. 
Hey @Andreas_Hegenberg, thanks for checking! I installed 6.095 and the issue still occurs. I have bound:
- Button 3 to move left a space (without animation).
- Button 4 to move right a space (without animation)
Each button 3 press is detected twice, resulting in two actions being triggered.
Button 4 presses are detected correctly.