Thread:Extension talk:Semantic Forms Inputs/datetimepicker is not supported in multiple-instance templates/reply (6)

I have a similar issue:

If a page is created (saved for the first time) the input of the datetimepicker field is not saved. If you edit the page (saved for the second time) the datetimepicker field is saved. This is strange...

My versions: MW 1.19.7, Semantic Forms 2.5.2, Semantic Forms Inputs 0.7

Any idea what causes the bug and how to fix it?