Dropdowns in Horizontal Stack currently broken by Wix (confirmed by Wix Support)

Question:
Why can’t I have a Dropdown in a Horizontal Stack?

Product:
Studio Editor

What are you trying to achieve:
I am trying to add a Dropdown to a Stack on a page but the Dropdown seems to break the Stack. I created a video of one of the behaviors where, if you have a Dropdown in a Stack, the Stack cannot be changed to horizontal: https://youtu.be/4FA-YOV_RBk

Another behavior I see is where the Inspector panel in Studio is blank when clicking on the Dropdown in the Stack, although I wasn’t able to duplicate it in this video. I do have a complicated page where the behavior happens and can post a video of that if that’s helpful.

Following the Contact Us WixBot, I have cleared my cache and cookies and the problem persists.

What have you already tried:
Created a blank page with nothing but a Stack of Text box and Dropdown.

Additional information:
Other elements, Text Boxes and Input Boxes etc, work just fine, stacking horizontally and vertically and the Inspector panel always shows.

I just spoke with Wix Support and they were able to reproduce the issue. They are escalating.

Ticket number 1459127086

Just got another email this morning saying they have escalated.

From Support:

Your issue was forwarded to our developers, and we are working on it.

You will get updates from us as soon as possible. As a possible workaround, we can advise to unstack your dropdown, re-position elements as you wish, and then stack them back.