Reproduction steps:
- Select Glyph of Stability.
- Put an item.
- Select Rune of Shattering.
At this point, the Glyph will be blacked out and you would assume that the glyphs won’t be consumed. That is not the case; the Glyph will be consumed.
I reckon this is not intentional?
Edit: I’ve also tried this on Glyph of Guardian and that glyph is not consumed.