Problem Editing Time on Xforms

Hi everyone, I am using Openmrs 2.2.1 with xforms module 4.3.14. I have notice a problem that the form does not allow editing time during data entry on xform. We are able to edit date but we also want to be able to edit time especially when are entering data retrospectively. When you started editing time it removes the full colon which separate hours and minutes, and you cannot type it back. Then the form does not submit. If there any ideas please help.