[Solved] Android contact backup : only last contact present

Hello,

I am currently migrating to a new phone and reconfiguring all Nextcloud apps on my new Android.
I enabled the contact and calendar backup feature in the Nextcloud app, as it was on my old phone.
The problem is that I have only one contact (the last one added) in the backup file. On my old phone, the contact backup is still good, with all the contacts in it.
I can’t really figure out why this would happen, and why only the last contact added is present in the new phone’s backup.
The contact (and calendar) sync feature (with DAVx5) is working as intended, and I have all my contacts synchronized on my new phone.
As information : this particular contact was first created in the phone’s “account” by mistake ; I then removed it from the phone and put it in the DAVx5 account (along all my other contacts).

I don’t know how to debug this further. Any ideas?

Thanks

Just for reference, I managed to fix it by uninstalling Nextcloud and DavX5 apps, then install and configure DavX5 before installing and configuring Nextcloud.
Now the contact backup from Nextcloud has all my contacts in it.