Steps to replicate the issue (include links if applicable):

• Go to pl.m.wikipedia to an unreviewed page.
• Click on "Anuluj zmiany" (wpReject).
• (optional) change message rejecting changes.
• Confirm rejection.

What happens?:
Shows desktop page with some session related message and changes are not rejected.

What should have happened instead?:
Show mobile page, changes should be rejected (withdrawn; reverted with a message).

Software version (skip for WMF-hosted wikis like Wikipedia):

I think it worked last week or a week before that (not sure when did I last use mobile rejections). So maybe related to mobile diff changes? T353479

Other information (browser name/version, screenshots, etc.):

starting the process	session message	my browser