SNMP on Balance 710 not working

I have 2x Balance 710 HW2 running in HA on firmware 6.3.3 build 3560 and SNMP is not working. Tested with v2c and v3 and my NMS is PRTG.

Meanwhile, I have a Balance One Core on 6.3.1 with the same v2c settings which works as it should.

I’ve browsed the forums already looking for solutions but I’ve found nothing that helps me. Any suggestions?