Problem with the masking brush in Lightroom for Android

Hi, I use Ligthroom mobile for Android on mi tablet Xiaomi Pad 6.

When I use the brush in the masking section I'm experiencing a problem. With the first touch of the screen I get a 100% intensity circle (selection) and from there, all the rest of the brushing (without lifting my finger) deliver only a solf selection. This happens with all the "first touching" of the screen, no matter what "flow", "feather" or "size" amount I use. The first touch gets a 100% intense circle based on the parameters I choose for the brush and them the rest of the selection is very soft.

I'm attaching a screen record where you can see clearly the problem.

Is there a way to solve this?

Thanks!!