Frequency Separation not working normally anymore - Photoshop 25.9.0
Hello everyone! I'm sorta new to photoshop but I need dire help with frequency separation. I followed a tutorial video on youtube and did every step precisley. At first it was working just as it was shown on the video but then the mixing brush effect starting to make this awful mush and I don't know what's causing it. I even resetted all the settings too and reinstalled PS but the same thing keeps happening. 
This is my Gaussian Blur settings on the LF layer.

This is the Apply Image settings on the HF layer, 16 bit version.

On the HF layer, I have Linear Light selected in blend mode

This is my Mixer Brush settings on the LF layer.

And finally this is that mush blur effect when using the mixer brush on LF layer.
