My Ubuntu + i3 freezes randomly without any log

I'm using Ubuntu server 21.10 with i3 along with Compton. Everything thing works fine, but sometimes (every 2 or 3 days) it freezes completely and no more action could be taken, nothing works and I couldn't even find any log in journanctl or other places. I have no idea what is going on. My computer is on constantly and this happens also when swap or memory has almost 30% or 40% free space. Memory 16 GB Swap 20 GB