sporatically it just stops working / mouse is at it's default. It kept happening with regular logitech options, was hoping options+ will fix it. but nope: buttons go back to default while options+ still shows them remapped.
sometimes turning mouse on and off works and new mappings kick in. most of the time no though. eventually after doing it a few times it comes back.
mx master 3 for mac, high sierra os, 2020 macbook pro