RDP Connection with custom scaling (High DPI)

I've two computer both running Windows 10 (1909).

PC 1 has a 4k 27" screen and I've set custom scaling to 160 %. When I open a RDP connection to PC 2 it has set the same scaling for the RDP connection, as well to 160 %. But since last Friday it sets the scaling to 150 %. I've no idea why?

Then I tried the following settings:

PC 1 160 % --> RDP PC 2 150 % <-- last week this was 160 %
PC 1 100 % --> RDP PC 2 100 %
PC 1 125 % --> RDP PC 2 125 %
PC 1 150 % --> RDP PC 2 150 %
PC 1 170 % --> RDP PC 2 175 % <-- last week this was 170 %
PC 1 175 % --> RDP PC 2 175 % 
PC 1 200 % --> RDP PC 2 200 %

I can't find any setting for the DPI value of an RDP connection, see https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/rdp-files.

Solution 1:

The behavior you are seeing is by design as Windows snaps scale factors to specific boundaries. This change was made at the end of 2018 to address underlying architectural issues. Scale factors in the latest Windows releases will snap to:

• 125%
• 150%
• 175%
• 200%
• 225%
• 250%
• 300%
• 350%
• 400%
• 450%
• 500%