I’m with @polygonpusher and at a loss. My only suggestion would be to try and remove the :as as I don’t think it’s needed, though I have no idea why that would affect anything. Just a hail mary at this point. I’ve never run into something like this before. Would have to see more context of how you have stuff set up.
Have you tried deleting your _build directory and compiling it again? I ask this because I often get this warning when changing a route or updating dependencies. Here are the steps I follow when I start getting errors/warnings and everything looks like it should be working fine.
I wish I knew exactly what I did to fix this, but it it working correctly now. I updated to phoenix_live_view 18.18(doubt that fixed anything). I suspect that @wceolin is on to the situation that was causing my problem. While I did not explicitly delete the _build directory, I made enough dependency changes that may have caused the offending mod to rebuild. I know that a mix compile --force did not fix the problem.