It seems that the Thunderbird integration to Ubuntu is taking some time, and I'm okay with that, I have workarounds for most things like keeping Thunderbird open in the notification area, but there is one thing: the Lightning notifications about events (not Ubuntu's native notifications, but rather Lightning's pop-up window notifications), which I set usually to one hour before the event starts, never appear on time. They do appear, but much later on, and when I see them it's usually after the event is finished. I checked if it's a timezone problem in Thunderbird or Ubuntu, but in both places the timezone is set correctly. Does anyone have an idea? Thanks in advance!