Jason found a recent regression in the thread safety of runtime reflection. Fix: https://github.com/scala/scala/pull/9080.
A map ordering problem also turned up, present at least since 2.13.0, but an easy/safe fix to include since we’re rebuilding anyway.
Both fixes are now merged. The second release candidate is 2.13.3-bin-d23424c. Community build is now re-running. Hopefully we can release on Thursday.