Ontology Options for Finding Terms- hidden Terms option is not validating hidden Terms

set up : make Diagnosis-ICD10 folder as hidden
Navigate to Ontology Terms=>Find tab
Click on the Options menu
check the Show hidden Terms Option
Search for 'pervasive and specific developmental disorder'
Now go to Navigate Terms tab
Check the Show hidden Terms option under that tab
Now go back to Find terms
Click search
The term is displayed and the category drop down shows the Diagnosis ICD10 option

Issue: the Show hidden Terms option is not refreshing the Category section to display the hidden Ontology and find the hidden term.
It seem to be dependent on checking the 'Show hidden term option' under Navigate Terms option to refersh the Category and to display the hidden term.