Content of Dynamic Symbols moves when moved with the Selection tool.
It was recently mentioned on the Illustrator forum that the content of Dynamic Symbols is shifting when the symbol is moved with the black selection tool. Changing the type to Static seems to solve the problem.
From the forum:
https://community.adobe.com/questions-652/critical-bug-objects-inside-symbol-shift-out-of-place-when-moved-with-selection-tool-cannot-undo-1633605?tid=1633605&postid=7715146#post7715146
and an older one with an example file:
https://community.adobe.com/questions%2D652/symbols%2Dbreaking%2Dapart%2Dwhen%2Dmoved%2Din%2Dillustrator%2D817905?tid=817905&fid=652
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Look like these 2 requests are relAted:
1. Registration point and boundaries of a certain symbol jump when a document is opened — https://illustrator.uservoice.com/forums/601447/suggestions/47420783
2. All my symbols gets displaced all the times — https://illustrator.uservoice.com/forums/601447/suggestions/50998906