OneDrive is updating files...

We don't know in advance what your OneDrive configuration is. If you have OneDrive installed on multiple devices then it will be syncing updates via the cloud across all those devices, including any documents you have shared with edit rights to other people.

Try the OneDrive troubleshooter (easy to find online) and also test turning off any other local services like antivirus, VPNs that may be inhibiting sync