Truenas Web UI and apps are unreachable but SMB works over VPN

Hi everyone.

So i’m facing a wierd issue where my TrueNAS machine gets unreachable sometimes. I don’t know if it’s only over VPN (router is the vpn server) or locally too but i can’t access the Web UI or the apps (jellyfin) until i do a reboot.
I can access the NAS over SMB though and play movies but no traffic shows on the router.
Also like a month ago when i tried to log in i got an error message that the middlewared UI service crashed, rebooted and that solved it. This might be a different issue but i thought it was worth mentioning.
Different unrelated issue is when scrub automatically runs every 2 weeks, sometimes it shows 1 chksum error but everytime it shows on a different disk.
Had no problem with the machine for months after i built it, i think the issues started around the time i moved the System Dataset to the boot ssd but i can’t see why that would be a problem.
Any tips is welcomed.

Specs(custom):
CPU: Ryzen 5 3600
CPU: Kingston 2x16 GB Unbuffered ECC
Mobo: Asrock Fatal1ty B450 Gaming-ITX/ac
GPU: Nvidia Quadro P520
Case: Jonsbo N3
PSU: Be Quiet SFX Power 3 450W
Storage: 4x4TB WD Red Plus in raidz1

What is your boot disk?