Lost DDL event Receive body settings after modification of WorkPart structure

In our internal  Addon there is a WorkPart structure. I found out there was a syntax mistake in name of one variable. I fixed this error and released new version of the addon.

Now I have a problem. If I update project with new version of the addon I lose all linking in all Events which are using this structure. I understand I will lose only linking of items with changed name, but in this case linking of all variables in receive body is lost.

Is it standard behaviour?

 

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