I noticed M2 seems having difficulty retrieving emails when I have little bit more tabs opened.
Sometimes , web page also not willing to open due to the same reason. I need to kill Opera by task manager and re-start in order to let it work again.
Any other solution instead of kill the Opera as re-starting takes a long time due to the large email data base.
See below the M2 "hang " in the beginning of retrieve and just stays in there no longer picking up mails nor any progressing . ( Opera can work and is not hang )
Thank you very much.