Router and everything is definetly not the problem.
IP adresses work 100% and other miners than S5 have no issues at all.
Nicehash might be an option, i will switch 10 to another pool and see if it changes.
Any idea why nicehash crashes them?
Nope but when I moved mine to f2pool they were up for weeks instead of rebooting them daily.
Isn't this because of the lack of "extranonce" support? (dunno, just throwing the idea up there)