To confirm whether it was the former, check the Activity Log and see if there’s any evidence of object deletion. If not, then you may want to open a Miro support request via the form here: Submit a request – Miro Support & Help Center
To confirm whether it was the former, check the Activity Log and see if there’s any evidence of object deletion. If not, then you may want to open a Miro support request via the form here: Submit a request – Miro Support & Help Center