OpenMediaVault Share not accessible when OMV account name equals Windows username

Question

I have a couple of SMB shares set up with OpenMediaVault:

• Public, runs fine

• Private, with username "Private" runs also fine

• Dani with omv username "Dani" and Windows username "Dani" can be accessed via Android App (Solid Explorer) but not with Windows, I
  also specified the "login with different username" and applied Domains like "NEMESIS\Dani" for the username (NEMESIS is the OMV hostname). Also when I add a user named "Hans" it can be access with Windows.

Is this behavior normal and can it be avoided somehow?