color for tags in opam files lost in the middle of an opam file

[olafhering]

with 20230124T171538 4c907ef I got the wrong color for license: and all following tags, see attached screen shot. It happens work for other opam files in ocaml/dune@d3d628f

[olafhering]

I get mixed results with vim *.opam with ocaml/dune@c939c2b0f. Initially dune-configurator.opam and dune.opam are wrong, maybe due to that lone "dune" in the description?
A second vim *.opam shows all files correctly. I suspect vim itself has its own share on this bug. I can not reproduce it at will...