A few days back I rode through a biblical, tropical, torrential downpour (visibility is about 100-200 meters) for about 50km.
Yeah, not really smart, but I was too lazy to stop, and if I did, I will have to ride a very lonely pass stretching about 30km in the dark, and it gets very spooky there (there have been cases of supernatural stuff there, and I'm not too fond of experiencing it first hand)
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Anyhow, after 20km or so in the rain, the gear indicator disappeared from the display, while others showed what they were supposed to show. I was at 5th gear at that time.
However, when I dropped to 4th gear, or upped it to 6th, the number reappeared. It was just the number 5 that vanished.
After a while, the number displayed normally, as though nothing happened at all.
Waters messing up with electronics? Why only gear indicator was affected?