I experience the same issue. The search bar (top-right) area disappears after the app has been open for X hours. If I close Airmail and then re-open it will appear. Kind of a pain and would like to see this fixed.
I have the same issue. This issue has been posted online long time ago. The administrator should pay attention to this problem as without searching function, reading a massive amount of emails is a huge pain. This could lead to the entire app become useless.
Same issue here and it is VERY annoying. I have to dig through emails pretty frequently throughout the day and at least once a day have to save started drafts, star open emails so I remember which I need to address, etc so that I can restart the application.
PLEASE fix this bug. Ive grown accustomed to the interface and otherwise very much like this email platform, but this issue is enough to make me want to switch.