Discovery Bank app behaviour

[v3gout]

I'm unable to log in to the Discovery Bank app if I'm connected via WiFi and fibre, but I can log in if I switch off WiFi and use cellular data instead. If I do log in via cellular, I can then switch to WiFi/fibre and everything works - except for the facial recognition. If I have to take a selfie for verification, I have to switch back to cellular data.
Is this a common situation? I'm guessing that the bank server creates a connection back to the app (web socket?) that is blocked by the fibre ISP or router, but is not blocked by the cellular network. Is this likely? Is there any way of telling what ports are involved?

 

[SauRoNZA]

Running a weird VPN or DNS?

 

[v3gout]

Running a weird VPN or DNS?

Nothing fancy - standard ISP-managed fibre and wifi router

 

[SauRoNZA]

Nothing fancy - standard ISP-managed fibre and wifi router

Eish.

Try change your DNS on the device having the problem to 1.1.1.1 and 1.0.0.1 and see if your problem goes away.

 

[MachoPants]

I'm unable to log in to the Discovery Bank app if I'm connected via WiFi and fibre, but I can log in if I switch off WiFi and use cellular data instead. If I do log in via cellular, I can then switch to WiFi/fibre and everything works - except for the facial recognition. If I have to take a selfie for verification, I have to switch back to cellular data.
Is this a common situation? I'm guessing that the bank server creates a connection back to the app (web socket?) that is blocked by the fibre ISP or router, but is not blocked by the cellular network. Is this likely? Is there any way of telling what ports are involved?

Never had this happen, the discovery app on my honor device is solid and stable