Facet serialization is located in Kotlin repo, and it uses new(1.9.*) stdlib in compile dependencies. But when it is used by IJ it has previous runtime stdlib dependency (looks like 1.8.0). So here is workaround, that specifies apiVersion and languageVersion, that does not produce such problematic outputs.
#KTIJ-24903 Fixed
Merge-request: KT-MR-9333
Merged-by: Aleksei Cherepanov <aleksei.cherepanov@jetbrains.com>