This report is a clone of MC-269673, which was previously misunderstood. It is recommended to keep this bug report open for Mojang to evaluate, as the alteration wasn't disclosed in the changelog. If this is marked as a duplicate of MC-269673, MC-269673 should also be reopened. Previously, all chunk border lines within the current chunk were colored yellow (except for corner lines and those highlighting subchunk borders). However, some are now cyan. I seek confirmation from Mojang regarding whether this change is intentional. This report does not constitute a feature request or suggestion, as the expected behavior was present in older versions. MC-183501 was also deemed a valid report, indicating that Mojang acknowledges unannounced changes like these as legitimate issues.

Steps to reproduce

1. Start version 1.17.1
2. Press F3+G
3. Start the newest version
4. Repeat step 2

Observed: The color of certain lines outlining the chunk border of the current chunk has changed from yellow to cyan or light blue.
Expected: The color of these lines would remain yellow, consistent with the pre-1.18 version.