I added a Riden PSU using uart and the path \\.\COM11. (the prefix is required for COM ports >= 10).

This got written into recent.yml unescaped as

psu:
    path: "psu:riden_rd:uart:\\.\COM11:115200"
    timestamp: 1762034404

causing a crash on startup:

terminate called after throwing an instance of 'YAML::ParserException'
  what():  yaml-cpp: error at line 2, column 35: unknown escape character: C

The "fix" is to replace it with

    path: "psu:riden_rd:uart:\\\\.\\COM11:115200"

but you need to do that every single time.