The Reset to Defaults button in Editor Preferences does not reset all the properties to their default values.
Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4543149), 4.22 (CL - 4546476)
Expected: The properties would return to the values that were set to default.
Result: Not all properties reset to their default values
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-66272 in the post.