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Hi Marina,
Thanks for your updates.
About the first issue, I would like to explain that on our side, we didn’t meet the issue.
If you meet the issue, we suggest you post a new thread, After that, our engineers will effectively provide help for you.
About the second issue, I would like to explain that you use the feature on classic experience, if you still want to use it, I suggest you return to classic experience:
Based on my test, on classic experience, if I move the folder, the link still works.
Thanks,
Qing