I doubt they care about Mac customers. If they did, they would have avoided ruining the app's UI so that customers don't have a good reason to jump ship at the first opportunity.
The iPad app UI is far more frustrating to use, mainly because the search function is hidden behind a down scroll now.
I'm keeping an eye on Proton at the moment as I use their email and they do have a password manager offering.
In my experience, this happens when there is a new Chrome version, but you haven't updated to it yet. When you quit and restart Chrome, it can update. Next time the extension stops working, check chrome://settings/help.