Fractional scaling keeps changing Mouse sensitivity [KDE]

Hi,

i have a laptop which has a 1440p screen.My mouse feels great at 100% scaling but everything is so small.then changing scaling to 150% my mouse sensitivity feels way much faster.mouse accel is turned off and selected profle is flat but its not fixed the issue.i tried this command but it broke kde taskbar.I dont now what should i do now.It is so annoying.

echo “QT_SCALE_FACTOR=1.35” >> ~/.profile

Does turning the pointer speed down not feel satisfactory either?

I think you can also try changing it via libinput configuration somehow, but I have not looked into that myself.

And I am now wondering if this issue might have had something to do with fractional scaling as well:

I also tried that pointer speed down but it feels weird for me.I will try changing that via libinput.

thanks for your response