Incremental file backups do not reflect deleted folders

Hi There,

I did test backup of a 5Gb folder. Firstly I’ve done full file backup - no issues.
Then I deleted one folder with 2 files from backup folder and did incremental file backup - and it did not reflect this deletion on the server. In this newly created backup deleted folder still existed.
Then I added one small file to the root backup directory and run incremental backup again- this file was added to backup successfully and only now deleted folder disappeared from the backup.

Could you please check and fix this issue?

Thank you in advance.