The black screen startup bug introduced several FW's ago, at least for some of us, hasn't been fixed in 17.24. Well, looking to the next update.....
Same bug for me
Same for me with Bugmin 965
How to fix? My Fr 965 stays black after update but I see it’s connected to my phone and I get notifications
Yes, it's still an issue for me too.
You can fix by holding on/light button to trigger the emergency screen (if you have set it up, you can cancel next) or connecting the watch to the computer.