{0.tag} not working anymore

[naoliv]

I don't know if it related with r6675 or r6677, but using {0.tag} doesn't seem to be working anymore.
Using the "element of" example and changing it to use {0.tag}:

node[amenity=parking] ∈ *[amenity=parking] {
          throwWarning: tr("{0} inside {1}", "{0.tag}", "amenity=parking");
}

I get this:

{0.tag} inside amenity=parking (1)