User Agent: Mozilla/5.0 (Windows NT 6.1; rv:40.0) Gecko/20100101 Firefox/40.0 Build ID: 20150807085045 Steps to reproduce: Updated to TB38.2.0 Set windows to "Sleep" (Hibernate) Wake up windows from sleep TB is not automnaticly recieving my mails, have to do it manualy Also the kalendar pane is not updated anymore Actual results: TB is not automaticly recieving my mails, have to do it manualy Also the kalendar pane is not updated anymore Expected results: Should recieve my mails as set in preferences Should update teh kalendar pane on the right side Maybe useful information: http://i.imgur.com/vPgcXog.png

If you (re)install version 38.1, does the problem go away? https://archive.mozilla.org/pub/thunderbird/releases/38.1.0/win32/en-US/

I installed 38.1 (de) and made a short test (hibernate for a few minutes). Mails get fetched; so the 38.1 is teh last working version. PS: Same on my Laptop with Win8.1 64bit! 38.2 is not recieving mails or updating calendar pane after resume