Transparency on CPAL/COLR font

Hi, I’m working on a color font and I need to make disappear some layers on some color palettes.

In my tests I can set them to 1% transparency but if I go to 0% the layer appears just white.

I’m working on a CPAL set up with export to SVG as well

Is it a bug? Should I just search por an 1% not so bad colour?

Thanks in advance

Can you send me the .glyphs file and where did you test this?

A different question:
Is there any way of having the top black layer over the next glyph?

Unfortunately, no. This is a limitation with how fonts are drawn.

I was complaining about that in several meetings about font format. Hopefully that will be addressed some day.