For the longest time, my cherries would get out of my 10 gallon and dry up on the carpet. This happened at least 5 or 6 times. I even had a cover, but there was a 1" space at the back that was uncovered.
I can confirm that Amanos survive a bit crawling out of the tank. Open top setup in my case as well. They jump or crawl out of the tank because there's something nasty going on in there. They did this every time I over fed, I'm guessing it was either ammonia or a nitrate spike due to excessive organic left over.
An emergency water change resolves the problem but you might want to check water parameters and try to not over feed them if this is the case. They will not starve if fed once every couple of days. Avoid high protein food, try to grow algae.
I have shrimps from CRS to PFRs to Orange jump out of tank. Funny things is, in the 1 year of shrimping, all of the jump occurred in a 2 weeks span, nothing before, nothing after. I do have cover on most of my tanks now though other than one semi-show tank in the living room (and no shrimp jump from that tank after that 2 weeks span either).