Reproduction steps

Scala 2 version: 2.13.18
Scala 3 version: 3.7.3

1. Clone this minimum reproducibility case:
   https://github.com/jadenPete/scala-path-dependent-type-bug-reproduction

2. Run sbt compile

3. Observe the following compilation error:

[error] <REDACTED>/feature-flag-evaluator/src/main/scala/FeatureFlagEvaluator.scala:3:50: type mismatch;
[error]  found   : flagWithData.flag.schema.Data
[error]  required: flagWithData.flag.schema.Data
[error]     flagWithData.flag.schema.parser(flagWithData.data)
[error]                                                  ^
[error] one error found

Problem

I'd expect this to compile. If all four projects in the repository are compiled with the same major Scala version (Scala 2 or Scala 3), this does compile. It seems to be an issue specifically with Scala 2/3 compatibility. Note that this may be an issue with the Scala 3, and not Scala 2. If it is, let me know and I'll close this issue/open one in https://github.com/scala/scala3. It also may be possible to whittle this down to an even more minimal reproducibility case then the one I've presented.