Post-edit: You’ll see in a post below that this might be partially an issue with my ISP (Cox Communications). I don’t know for sure. But I do know I don’t have the issue with older version thunderbird-52.9.0-1.
Wanted to get this reported ASAP will try to get some details/information over the next day or so. Thunderbird 60.0-1 freezes every time when I first open it. So far I just force close it and restart it and on second or third try it seems to work normally. There is also a new getmail-5.6-1 in contrib-testing. Don’t know if this or Thunderbird is culprit.
Post-edit: get-mail has nothing to do with this. It is not installed.