Losing webpage connectivity on VLAN

[netnewb]

Hi,

I have a home setup like this:

Internet –- Netgate SG 2220 --- MikroTik --- workstations, untagged (LAN)
                                                            --- Intel NUC (proxmox), untagged, VLAN13, VLAN20
                                                            --- FreeNAS, untagged, VLAN13

I'm using VLAN20 for some small webservers like dokuwiki, nextcloud, subsonic and I'm trying to use VLAN13 as a "management" interface for the NUC,  FreeNAS and MT (web configuration, ssh).

When I'm accessing webpages (LAN to VLAN13) for proxmox, FreeNAS and Mikrotik, I lose connectivity after about 10 seconds and I have to refresh the page to be able to do anything. I don't see this problem with the other webservers and I didn't have this problem when they were on LAN.

Some details:

• pfsense updated to 2.3.3, no extra packages (snort, pfblocker)

• pfsense is the DHCP, DNS, server. all routing is done here

• rules between LAN and VLAN13 are allow all

• mikrotik working as a switch only

• tried with different switch

• tried firefox and chrome

• no alerts in the firewall

• no abnormal CPU usage in pfsense or MikroTik

• accessed FreeNAS from VLAN20, same behavior

• SAMBA doesn't seem to have a problem cross-VLAN

[netnewb]

Bump and an update:

• I don't have problems over VPN, just over LAN

• SSH also gets disconnected

Any pointers are appreciated.