[SNAPSHOT] managed backup issue

I have set up managed backup to keep the 5 last backups. There are 8 in HUB, but this is related to automate settings in HUB (Auto backup before every update).

Main issue is that I have also host backup which make this backup as 12GB.

Managed backup say: 350MB.

During the chat we notice files from managed backup are not delete after sendto wpmu cloud.

Any way to check what could cause this?