Structures loose information when definition changed

I have a BP structure and then an array of structures in a BP.
I filled the entries in the array with values in the BP editor
I changed the buildup of the structure removed and added fields
There was a crash of the editor
When I restarted, all values were gone from my arrays and I must enter them again

Hello,

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https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks