4K Multi-Region Cannot Merge

This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 4k多空region无法merge

| username: songxuecheng

[TiDB Usage Environment] Production Environment / Testing / PoC
[TiDB Version] v6.1.6
[Reproduction Path] What operations were performed when the issue occurred
[Encountered Issue: Issue Phenomenon and Impact]
[Resource Configuration] Go to TiDB Dashboard - Cluster Info - Hosts and take a screenshot of this page
[Attachments: Screenshots/Logs/Monitoring]

Suspect it is related to TiFlash, not sure if there are any known related issues.