have your CMB2 settings changed at all since the previous ones supplied earlier in the thread?
One thing to keep in mind, and I know it’s potentially a bit of an annoyance, is that the spots assume /mm/dd/yyyy for the format, at least out of the box, even when typing it in manually instead of using the jQuery popup.
I was able to recreate the lost field when i gave a non-existent month. Not sure I want to call that a bug, or a notable inconvenience for anyone that does dd/mm/yyyy. I know there are filters in the CMB2 code for date formatting, though I’d need to dig back through it to find the specific ones I’m thinking of.
Related. It’s not in place yet, but it’s close. We have this Pull Request pending once a few more details are covered https://github.com/WebDevStudios/CMB2/pull/318 Hopefully in a near future release π