incremental backup of VM larger than Full backup

[Posix86749]

Hi!

I have ESXi 6.65 host with vm on it. This vm has one thin provisioned vmdk. Size of this vmdk is 100gb (for OS), and real size: ~ 15 Gb.

I've created a job to backup this vm: one full backup every week, and incr.backups every days.

Now i can see something strange:

Full backup has ~15 Gb size, but incr.backup has 100Gb size. I think something wrong with it. Why incr.backup has size equal to full volume size?

[pkh]

You might want to turn off and then on the Changed Block Tracking on that VM