I noticed this as well and I would like to add that this seems to happen to train stop names in both of these cases: 1. When creating a blueprint Factorio will fail to replace a signal in the train stop name with the parameter signal, even though it shows up as able to in the parameter menu inside a...

I noticed that when blueprinting combinators or displays panels that have one or more descriptions containing rich text icons those icons aren't recognized by the parametrization system and don't show up in the blueprint parameter menu. Likewise inserting the parameter icons manually in the text do ...