Samsung Viewfinity S9 display disconnects external storage when entering display's menu

[7geck7]

I have laptop connected to samsung viewfinity s9 display by thunderbolt 4 cable.

I have an external storage connected to display by USB-C cable.

Laptop can see external disk unless I enter display's menu. When I enter - it disconnects. As soon as I exit menu - external storage reconnects. 

I tried  MacBook Air M2 and Thinkpad T480 (win) - the same issue.

I tryed to use SSD with AFPS and HDD for Win (with something like FAT or NFPS) - the same issue

That makes me think that the problem is on Samsung's side.

Could anyone advise what else can I try?