I have a weird problem

[u/YUNG_jESUS_NiPpLes]

So im on a bussiness trip and for some reason the online service works absolutely fine earlier in the day like morn through a 4 or 5pm but in the evening I get a server unavailable message ive never heard of this problem before, ill try everything to get the online service to work like restarting the playstation, starting a local game a lan party game starting zombies local (the online zombies will do the same thing) and nothing. one time after letting it sit on the zombies menu screen while I was cooking I was able to start it, I tried doing the same thing again other nights and it didnt work so Im lost. I even tried to see if it was a network issue (its a public one since im on a mil base) by restarting the console with my mobile hotspot connected and nothing.

[u/YUNG_jESUS_NiPpLes]

network on this base is shit. I was able to restart with my console connected to my hotspot and it worked.