Strange Red alert

I opened a glyph with components only and I got this partial red background. Strange…

Glyphs 3.11 (it did happene

d in the previous version too)

That is probably one of the hints (the gray bars) that is misconfigured. Run this script in the Macro panel to remove all of them:

Layer.hints = None

Good idea. So I managed to get rid of them by Autohint. Thanks.