Expression with embedded double-quotes can't be saved in task assignments UI

Issue

• I'm using expressions (e.g. #{object.method()}) in my task data input/output assignments, especially for email and custom tasks. In some cases, I need to use double-quotes as part of the expression, for example when I have process variable that's a map and I just want to pass one value

externalProperties.get("PATH_TO_SERVICE")

• When I try to add any expression to the assignments editor that has double-quotes, and then click save, nothing happens. There's no error message, it just doesn't do anything. If I remove the double-quotes, it saves fine.