View field change history. Find what is deleting field value

The phone number for my contacts has been randomly getting deleted. Is there any way to see what automations or integrations have been updating the record? I have a couple of integrations with Google Sheets and Bonjoro that have access to the phone field but can’t seem to figure out what is causing the change. Thanks!

Short term I’ve added a contact note every time
I update contact fields via Zapier and in AC. It helps narrow down where the problem is occurring.