Found this gem while I going through Salesforce Workbench's disclaimer.
PS: I don't know why I was going through the disclaimer.

Workbench is an unusual one - Salesforce *heavily* endorse it in their trailheads and in other material, but are very quick to distance themselves from it if anyone has an issues...

@AlmondSauce I am not surprised. At times in Salesforce, things work, no explanation, things don't work, still no explanation.
Not at all different when you start encountering similar problems in workbench, and well at times in the Developer Console as well.