There is an issue with high resolution screen and the last pass extension where it becomes basically unusable. When clicking the extension, the top part is missing where the search bar should be.
Apologies that you ran into this issue Luckily, it’s at least a known issue which we are tracking here:
There is a work-around you can try though You can edit your shortcut for Brave (right click -> properties), specifically the Target area, and add the following to the end:
This is one that I’ll be trying to fix soon