Thank you very much. This part is what helped me solve the problem.
How?
There were no errors, but one Gmail account was stuck in âSynchronizing IMAPâ - with progress bar not moving (the irony is that it was the much smaller account).
If I restarted the app, every other account would quickly sync, but this one got stuck, hung up on it.
I double checked all the account settings - it was all good.
Still, I tried to remove the account. Close the app. Re-open the app and confirm that the account was removed.
Then I added the account (again, basically). Manually added the Gmail account (didnât bother to use the QR scan from the desktop).
And it synced, normally, in around 15 minutes. IMAP, then downloading emails (or attachments, donât remember the exacth phrase).
All good since then. Works normally - wonderfully.