Subtasks of repeating tasks get deleted

[Megafont]

If you create subtasks on a repeating task, the next day all subtasks are deleted.

This is very odd behavior, especially since the subtasks don't have the repeat section in their options page. I assume they are supposed to be automatically using the parent task's repeat settings, but instead are being treated as non-repeating.

Also, if you set a time estimate on repeat tasks, that has also been deleted when you open the app the next day.

[github-actions]

Thank you very much for opening up this issue! I am currently a bit overwhelmed by the many requests that arrive each week, so please forgive me, if I fail to respond personally. I am still very likely to at least skim read your request and I'll probably try to fix all (real) bugs if possible and I will likely review every single PR being made (please, give me a heads up if you intent to do so) and I will try to work on popular requests (please upvote via thumbs up on the original issue) whenever possible, but trying to respond to every single issue over the last years has been kind of draining and I need to adjust my approach for this project to remain fun for me and to make any progress with actually coding new stuff. Thanks for your understanding!

[github-actions]

Hello there Megafont! 👋

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[johannesjo]

Duplicate of #427