[bug] Thermostat scheduler - rename

C8 hub | 2.3.8.118
When I rename a Time Period Schedule in a Thermostat Scheduler child instance, it irreversably (? is that a word ?) corrupts that particular App child instance.
Only resolution I can find is to delete and re-create the instance.

I reproduced this 3 times:
create scheduler -> rename time period -> app toast.

As the change 'submits' the page goes blank and the scheduler instance cannot be opened again.
There were errors in the log something that includes the words Java, class, Cast. But when I went to find the logs to post this, all the logs had disappeared before my last reboot. (which I did after all my testing/shenanigans to try to blast out the cobwebs).

This is not urgent as I have done the workaround (delete/re-create), just wanted to flag for resolution.