Shifting front 24/46. But a new chain ruins it?

Hey everyone! Posting here instead of r/bikewrench because of my unusual front shifting range of 24t to 46t (comverted a triple into a double.) This setup shifts PERFECTLY. That is, until I threw on a fresh chain. Suddenly it refuses to shift up to the big ring. Nothing else was changed. Anything I'm missing here? I believe I simply matched the length of the old one. Old chain was an original Shimano HG, new chain is a PC830. I thought they were interchangeable in 7 speed. But why would chain effect front friction shifting? Edit: Photos https://imgur.com/a/Y8OI7Kh