Extra glyphs in Color Font open type (broken segments)

Thank you Georg, I stripped out all the caches, emptied bin, unticked COLR&CPAL for each active style, renamed font and exported, restarted, replaced fonts in Illustrator, restarted again, but the 1000broken segments are still showing. Then I found this forum chat advising others to make the glyphs as images/icons: PNG / SVG Export - #29 by dergraph
Is that what I have to do too?

This is my first font, which happens to be a color font, and I can’t list it for sale because of this. There must be something simpler to fix this i.e. that doesn’t require additional coding?
I followed these instructions: