Hello. My Thunderbird software automatically updated a couple of weeks back to 78.1.1. Since then, my current incompleted tasks (usually from the previous day) keep disappearing every few days. On a couple of occasions they have simply reappeared again, but most of the time they vanish completely. I rely on these a lot and it's been a great inconvenience. I've had to overcome this by making a back-up of my profile file virtually every day and reverting to this when the problem happens, but this is far from ideal. Any advice would be welcome.