Does not pack information to alpha channel properly

[SqueegeeDino]

Trying to use this tool to generate mask maps for HDRP but the alpha packing completely fails

[benxtan]

Any chance of getting this fixed?

[Tymski]

This is the only feature I downloaded this asset for xD

[LaserYGD]

Same here lol. Struggled for almost an hour until I figured out it's not packing the alpha channel correctly :/