iOS app doesn't function if instance subdomain has changed

[ecrode]

Setup

• Version: iOS app 5.0.160
• Environment: official app

Checklist

Could not find similar issues reported

Describe the bug

iOS app (and perhaps android) is bricked if the invoice ninja install is moved to a different (sub)domain.
When upgrading to the latest version, I've decided to install new instance on a separate VM and subdomain. Originally invoice ninja was hosted under bill subdomain, while the latest version is under billing. After everything got installed and seems to be working, I simply set bill. to redirect to billing via 302 headers, but found iOS app completely broken. No options to sign out, update server address or interact with the redirected instance. I've ended up having to bring up older instance back online and redirect disabled, just to sign out from the iOS app. Would I have lost domain in meantime iOS app may have been permanently bricked. Both old and new instances were V5 just a few years apart.

Steps To Reproduce

Setup instance on a custom domain and sign into the app, setup redirect from said domain to a new domain without fist signing out from the app; may be enough to simply disable the domain, though I've not tested that option.

Expected Behavior

An option to sign out / change server should still be available even if self install instance is not available at the old address.