I'm having a few problems with Calendar in Thunderbird after the last update, to 78.6.0 (64-bit). 1. The list of events is blank, even though several events are on the calendar for the coming month. Image attached. If I exit Thunderbird and re-open, or select a different time frame, say one week instead of my usual 31 days, I can get the list to show up again, but clearly something is wrong. 2. Edits made to one instance of a recurring event do not "stick" - they show up when I save them, but are gone when I look at them a couple days after making them. 3. Categories applied to individual instances of recurring events disappear (which may be the same as problem #2).