Might have bad sensor wire. Last year my Reedy 25.5 would just randomly cut out. Sometimes I could race a full day without problems, got to point where couldn’t finish a race. First few time I would turn it off then on and it would work. But got progressively worse.
Replaced sensor wire and never had it again. When I looked at the old wire I found 2 tiny spots were the coating was gone, bare wire.