Hi all,
After long time just reading in this thread, I finally want to contribute here as well. It's only with my experience and no solution beside wiping and reinstalling the app. I hope by keeping this thread alive and busy it gives this issue more weight and hopefully attention of capable support engineers.
I have massive issue with the phone of my wife (Pixel 3a 64GB). Without following any pattern, the outlook app eats up all the phones memory untill the system almost stalls. After a fresh install of the app it could happen in days or weeks, even made it almost 2 month recently. That made me wondering if the issue was fixed but yesterday, again my wife complained about warning messages and a stalled system.
My Pixel 2XL doesn't have this issue, although we both use pretty much the same accounts with IMAP.
Had already a lengthy contact with the support wich was friendly but at the end not helpful for my particular issue. Just told me that a solution is in progress...
Well, let's see what will happen
Cheers