Can't save API file with dynamic connections

For some time now I have been able to create dynamic DB connections using data bindings in the connection file. Since updating to 3.8.2, I cannot now edit or save any action steps in API files that have these dynamic properties. It seems that there’s some kind of validation that prevents saving and even prevents any query editors/dialog boxes/data pickers from opening, even if it is just to set a value. @jonl I know you use similar dynamic connections, have you had the same issue?

This is a HUGE issue for me - how do I get around it?

The only way I have found so far, is to set the files to the static connection I use for testing, make the changes I need, then open the API file in the code editor and then manually change the connection parameter there. This is not a sustainable way of working.