On linux, UE4Editor working directory forced to match binary location. Changeable?

I’ve been using the PlasticSCM plugin with UE4 4.19 successfully. I upgraded to 4.20. The plugin is supposed to support this version. It compiles and runs fine.

But I think a behavior changed from 4.19 to 4.20 where now the working directory of the UE4Editor executable is set to the directory containing the Linux editor executable. This screws up the integration with the PlasticSCM cm command line utility. As a result, the plugin’s integration to the actual source control system is disrupted.

Is the working directory of the editor a configurable option? Could anybody point me to where in the code I can find this so I can experiment with changing (or more specifically not changing) the set value.