Accepted answer

This issue just got fixed in core code:

https://github.com/backdrop/backdrop-issues/issues/7060

You can apply the patch from this PR to your installation:

https://github.com/backdrop/backdrop/pull/5206

And it will be part of core in 1.33.1 when that eventually gets released.

Comments

Thanks, bugfolder!

(if only I had added another page before panicking)