I believe I found what is causing the issue. After going through the changes I was making for my use of the jDate element, I did the changes one after I verified not making any changes at all and it was working. What I found is actually a change I did not need to make as the default formatting was doing the same thing, but not sure if this is something you would like to know to prevent what I just went through.
If you put in the following for the time format, g:i A, which is the default format with 24H turned off the time would not display even though I was able to input the date/time and verify it was saved into the database. Also viewable in the list. If you open the form, you do not see the date/time. After I removed this formatting the issue went away.
Maybe something you can replicate and then looking into the code see if it is just my format or all format changes that are causing this issue.
-Eugene