Vaadin8 regression with new items in ComboBox?

I think I’ve seen this issue before in the 7.x line but it was fixed towards the end but now the issue appears to have made a comeback(?)

If I have a combobox with a NewItemHandler I can see it being fired when I enter a new value and tab out but if I enter a new value and press a button, the NIH is not fired
should be fixed in 8.1.0.rc2 for those cases where this was still an issue.