Appraisal CO Subform not allowing COs to be added

In our Specify 6 instance Appraisal form the CollectionObject subform is initialized with initialize=“addsearch=true” and functions as expected:

However in our Specify 7 instance this field neither has the search function nor allows inputs:

Even with the addsearch removed, the Specify 7 instance doesn’t allow inputting Collection Objects. I’ve noticed the same happening with the CollectingTrip collectingevent subform that is also iniitalized with the addsearch function.

Is there something I’m missing in terms of Specify 7 setup to allow subforms with searches?

Best regards,