Software ver. 15.10 (already latest for my watch)
Second disappears from watch face for no reason, and the whole watch face freezes. Heart rate data can't be updated but minute can be updated. I can provide the video if needed.
I restart the watch everyday to ensure it functions normally, so don't tell me to restart my watch more frequently. And actually this is my 2nd instinct solar. I also found this issue on my 1st instinct solar.