My instinct Solar has started to crash and turn itself off duringpool swims. Sometimes it keeps some / all of the data (distance swam), but other times it does not.
Problem seems random as it is not all of the pool swims and not always at the same point. I got this on the 31 Dec 2020 and this has started in the past month.
The watch is charged weekly and I swim on Sundays, Wednesdays and Thursdays. I do not think it is power related as some Thursdays it is perfectly fine.
I have done a hard reset and it took about half an hour to sort itself out. It is currently on software version 18.54 and the last update came through in the past week.
It seems to be working fine in all other respects.