Mouse acts completely differently (pointer speed in particular) when the logi options+ windows is open and the active window
There is a critical functionality bug in the software. The pointer speed setting only works while the Logi Options+ app is open AND the ACTIVE window. If another window/application is selected, then the Logi Options+ settings are ignored. This makes it impossible to disable mouse acceleration on macOS as it is tied to mouse pointer speed (the bug exists on Ventura and on the previous OS). Essentially, when the logi options+ windows is active, the cursor acts one way, and when you click away, it acts a completely different way. This needs to remain consistent. I will be trying to uninstall and reinstall, but I see that I'm not the only person who has this issue.

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Darren Bain commented
I had the same issue with my MX vertical. Change the settings and it only works while using the app. Turns out that the global settings were not being applied to all apps. I had to set the pointer speed under chrome or any other app where it was not registering independently in the logi options app.