So I convinced now it is a Rhino bug.
Without Grasshopper open, Elefront tab shows as expected
Same for normal user text tab
Running Grasshopper I can get the values with Human and visualise with HumanUI
Running Grasshopper Elefront shows correctly
It is just the Rhino user text tab that doesn’t show. As I said it only happens sometime so not sure what’s happening
Any ideas? @wim @DavidRutten