Do not use the word “latest” to specify your JHF level, please specify the exact take number.
What is your precise ISP Redundancy configuration?
Please provide screenshots and explain what your precise goals are with this configuration.
My guess is that you’ve got an asymmetric routing configuration that’s causing issues (traffic coming in over ISP-2 then going out over ISP-1…or vice versa).
You should be able to confirm this with a tcpdump or fw monitor on the relevant interfaces.
The gateways attempt to connect to the management server on TCP port 257.