I'd never actually tried to enable both at once, but I'm not surprised it doesn't work. I love writing prose with Triplicate Poly, but I code with monospaced fonts, as neither most code editors nor most codebases seem to work that well with proportional fonts.
I just flat-out prefer the Code variant’s glyphs to the default ones in every case. Especially the l, which is what makes the Poly + Code handling unfortunate.
