We have two external drives that we backup to and swap daily (one staying offline at all times). We upgraded from 2016 Essentials to 2019 Standard a few months ago. For whatever reason, one of our backup drives will only have at most about 14 copies available... once it hits that it will drop down to about 5 and then back up to about 14.
The other drive has 130+ copies available. We've reset the configurations a few times and they're identical, the drives themselves are identical (NTFS).
Screenshots attached, any ideas would be really appreciated!