Attempting to build the Engine using the Debug Editor configuration results in a build failure related to a string literal (error C2338: Formatting string must be a TCHAR array.). There are three checkfSlow() macro lines in ClientSession.cpp that include a string literal. These need to be enclosed in a TEXT() macro in order for this to compile successfully with the Debug Editor configuration.
No. This particular code is new in 4.22.
The build will fail with the following error: error C2338: Formatting string must be a TCHAR array.
The build completes successfully.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-72996 in the post.