Strange behavior when trying to remove a record from One2Many in form mode

Support User
1

I have a form with a One2Many also in form mode. The same as with the party form where the addresses are a One2Many in form mode.

The problem is when I want to delete a record in the One2Many, everything disappears and not the record after the deleted one is shown. Also the back and forward buttons are disabled so there is no manual intervention possible.

You can experience this behavior on the demo.tryton.org for both 7.0 and 7.6

2

I do not experience this on the demo.
When the deleted record is already stored, then it just becomes readonly but the navigation arrows are working.
When it is not stored, it disappear and no record is select but the navigation arrows are also working.