Describe the bug

After update to 2025.12.1 I noticed, that my OAuth2 Provider ignores Authentication flow settings. Instead of using my custom flow, it defaults to brand one.

My custom auth flow still works fine if I visit page manually (i.e. instead of example.com/if/flow/default-authentication-flow/?ARGS I go to example.com/if/flow/custom-authentication-flow/?ARGS)

How to reproduce

1. Create new authentication flow
2. Create OAuth2 app
3. Modify OAuth2 provider to use new auth flow
4. Inspect browser network tab to see, which authentication flow is used

Expected behavior

Providers should respect custom setting of authentication flow (as well as other flows).

Screenshots

No response

Additional context

No response

Deployment Method

Docker

Version

2025.12.1

Relevant log output