Indirect Tag strange behavior on remote designer

I inherited a project from a colleague and am seeing some strange behavior when I try and use Indirect Tags.

If I open the project in a Designer running on the same computer as the Gateway Indirect Tags work normally. However, if I open the my PC or any other PC, Indirect Tags have the following strange behavior:

If I open the Property Bindings and go to Indirect Tag tab, the field for the Indirect Tag Path is missing:

I can click the little tag icon and select a tag, after which the Path field shows up but then it will not let me edit the Property Path:

If I go to something that already had an indirect tag binding, the references are unpopulated:

All this works normally on the computer running the gateway. Any ideas? I have a dozen other project I've run from the designer on my PC and don't have this problem on any of them.