DHCP server stops working

Hello to all. I have a RB 951G-2HnD with Ros 6.19 and firmware 3.18 and for some reason after some time the dhcp server stops working.
If i perform a restart, then everything starts working as normal again for some time (usually couple of hours) and then again the dhcp stops.

If I use winbox to enter the RB while dhcp has crashed, I see the dhcp and ip pool sections empty. If i try to re enter the dhcp configuration at that time, it doesn’t allow me.

This problem started some time ago, with the RB not assigning ips after some days of uptime. I thought it was a problem with overheating or something. but lately as I said before the problem has became really disturbing.

Please help. I haven’t tried to do a netinstall yet as I leave that for last option.