Raspberry Pi Cardano Node crashing problems

Hello, I am the operator behind [WOT], after the hardfork, my relay node and core node crashed.
I managed to do a hard reset and optimise it with zram to get them to work.
I am currently adding another relay node and I am repeating the exact same steps for it… however… it always crashes (broken pipe) before syncing 100%.
For the technical experts, I am operating it all with raspberry pis, following the armada alliance guide.
I wonder if it is due to the increase in network usage that causes only the 3rd pi to fail or the increase in power consumption or some other problem.
It is a brand new raspberry pi with a brand new ssd drive…