ExtFS for Mac - OpenMediaVault on Raspberry Pi 4

I have installed ExtFS for Mac, so I have access to data on EXT4 formatted harddrives. I use an external harddrive (formatted with EXT4) within a NAS-System (OMV - OpenMediaVault V 6.1.x).

But there is a weird behaviour I do not understand:

- I connect the harddrive to my Mac (OS Ventura) and create a folder XYZ within the NAS-folder
- I connect the harddrive to my OMV-NAS and have access by SMB
- I can only read the folder XYZ but I cannot rename or delete it. I cannot write data into the folder.
- When I create a folder XYZ on the harddrive by SMB, there is no problem. I can read and write.

Any ideas how to solve this?