If user changes Type/Mandatory values for a input/Output and keeps the name same, then values are not saved. 

Steps: 
Create WF 
Add Input/Output 
Save 
Now change Type and Mandatory checkbox for same input/output 
Save 
Go to Overview page and come back to Input/Output page 

Expected : 
Type and Mandatory fields should be updated as per changes done 
Type and Mandatory fields still having old values.