Updated information, since team came to office, two units went insane at this location. One unit worked after configuration reinserted, and another one losing configuration continuously. I really hope Mikrotik team can take a look to supout, and if they can see GPIO status, is reset is short or open.
Water at this place is uncommon, it is Saudi Arabia and dry season now, rain occur here only once-twice per year, but it can be a bit humid at evening, sea is not very far (few km).
Also strange, but there is option to disable reset button in config, i tried it. IMHO, as an option, maybe it is possible to convert (press reset button to ... ), to keep pressing on/off reset button to do config reset , so it will let customer work, till he replace unit.
If it is ok on this forum, a bit offtopic, can somebody recommend IP67, IP68 enclosures with integrated antenna, (better assembled with RB inside)?
I know there is list of vendors on website, but i want some people that has experience with supplier