I’m an iPhone user myself, so I am not well familiar with how Google and simultaneous Xiaomi backup management.
My father who has Xiaomi Redmi Note 8 Pro told me all his contacts are missing. I’ve tried to restore the contacts on the phone, but Xiaomi backup management wasn’t even loading (showing errors at "loading backup 0%"). I wasn't able to find Google Contacts at all on the phone.
I took a route of logging in to my father’s Google account on the web browser and then proceed to contacts.google.com where I could see all his contacts in trash and the "reason" was listed as "Deleted on Sprd - ums512_1h10_Natv". I was able to restore all the contacts from trash (thankfully) and immediately after restoring the contacts there on contacts.google.com the contacts appeared on the phone.
I am googling this message and see some traces of similar problems with contacts but nothing that looks useful.
How could I find out what app, system component or a setting could cause the contacts to be deleted? And how could I configure my father’s phone to prevent this problem in the future? Loosing contacts is a real horror story.