Windows: Win11 24H2 Thunderbird: Version 139.0.1 The screenshot shows the reminder window. The window appeared, I enter sleep on the computer, come out of sleep, there is no window. The same thing happens if I close Thunderbird (with a cross in the upper right corner) and then launch it. And the same thing happens after the computer is turned off and on. What actions have I done to understand the problem: 1) deleted the profile and created a new empty one, i.e. profile files have no effect on this; 2) reinstalled Thunderbird. The problem started 3-4 days ago. The problem may have occurred after the Thunderbird program update - the update was on June 2.