I figured out what makes my zwift crash at startup.
I cut the power on my apple tv completely after saving the workout by pulling the power cable.
Turns out, that once i turn the power back on for the next ride, that the zwift app is still runing. If i force quit that one first and then start zwift again it works.
Hope that makes sense.
Is changed behavior though since i’'ve been doing it that way for years and this only started recently.