Run task despite upstream request to skip

[Chais]

I have a short-circuit task with two downstream tasks and want one of the downstream tasks to always run, because it's a logging task.
I would assume that trigger_rule="always" is what I need, I can't use that, however, because I'm in a dynamically mapped task group.

Task-generated mapping within a mapped task group is not allowed with trigger rule 'always'

Effectively I want the logging task to run if the upstream task was successful, ignoring the request to skip from upstream. Is there a way to do that in dynamically mapped tasks?