Copy rule -> edit cron not working

[mueller-ma]

The problem

When I copy a rule that contains a cron trigger and try to update the cron, it resets to "Every day 08:00".

The original rule:

configuration: {}
triggers:
  - id: "1"
    configuration:
      cronExpression: 0 0 6 ? * * *
    type: timer.GenericCronTrigger
[...]

Expected behavior

Steps to reproduce

Looks good after copy:

But when I click on the cron:

Your environment

runtimeInfo:
  version: 4.1.1
  buildString: Release Build
locale: de-DE

[rkoshak]

I've seen this behavior once even without copying a rule. But I didn't have a chance to investigate it and I haven't figured out how to reproduce it. I think it occurs when you click to edit the cron trigger on a rule that hasn't been saved yet, maybe when the rule just hasn't been saved with the new cron trigger yet.

I completely forgot about this behavior since then and never came back to it but this issue prompted my memory.