schaling menu not working LowDPI(1x) HIDPI(2x) HIDPI(3x)

[hendrik00001]

What Happened?

I have set the language in Dutch, I'll try to find the english terms.

booting elementry os v 6 I can change the DPI size in systemsettings, displays (I can switch between lowdpi and hidpi)
booting v 7 in the schaling menu I cannot set hidpi 2x and hidpi 3x.
schaling can only be native 3840x2160 so very small

Steps to Reproduce

systemsettings, displays, schalefactor, clicking to try to set low, hidpi settings, the apply button in the bottom right corner stays grey.

schalefactor menu:
the setting is before changes is lowdpi
click hidpi
click lowdpi
a popup is shown with a question "do you want to keep the new display settings?

the menu registered the schaling setting to hidpi but it cannot make this effective
when the schaling is set back to lowdpi the menu offers the choise of keeping or not but since the highdpi is not working it will stay lowdpi with both answers

Expected Behavior

in elementry os 6 hidpi could be set, in 7 it cant

OS Version

7.x (Horus)

Software Version

Latest release (I have run all updates)

Log Output

tail -f /var/log/syslog

Feb 13 21:42:08 ThinkPad-X230 gala.desktop[1431]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x1c00008
Feb 13 21:42:12 ThinkPad-X230 gala[1431]: Dialogs.vala:99: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at path “/io/elementary/gala/dialog/900415536”

Hardware Info

laptop Lenovo X230t i5 8gb memory
external display 27 inch 4k BenQ PD2705U