I thought I left an adequate space for my People Dropdowns but when I search for a Name like "Jones" the part of the dropdown display gets overlaid by the next field.
This means I've got to expand my form a whole lot and move my Peeps to non-logical places so the dropdown is unencumbered. Am I missing an obvious setting that says to allow the drop selector to overlay the next field?
This happened to me as well. How did I fix it, hm, ... let's see.
Ah, and I realized that it won't appear past the bottom of a panel it's within. Which ... I guess requires re-organization.
Maybe someone else can tell us how to do that part - if there is a way to make it appear on top, beyond the bottom of a panel.
Partial Solution. I happen to have two Person Field stacked. If I remove the second field the first acts decent. If the second is there, I have the behavior with the first dropdown.
Interesting, I see.. so the top one would always need to be the "front" most.
No panel, though? The second field is what's trapping you? I have a section (in another panel - and mind you, I am on-prem) with 2 stacked (same as you describe) - but the first one's dropdown works until the bottom of the panel, second acts the same. But! It does dropdown over top of the person field.
Did you click "Bring To Front" on the top person picker?
Excellent catch. I needed to set the top one last. Then it worked!
Haha I probably wouldn't have thought of it if I hadn't just encountered it! I still want to know how to get it to go past the panel.. I am sure that will come up eventually 
Thanks for the correct-marking! 
That's the one! Thanks Marian! Bookmarked ^^
I think so.
FYI, it looks like following thread provides some workaround
I am having this issue as well. I have brought the field to the front but the text still goes behind the field below it.
the other problem i am having is that once a person is selected, the box scrolls up so that the name that was selected gets hidden. In this picture I have made the field bigger as a work around, but it is not ideal. Any ideas around this?
This method worked for me. Using the Nintex "Send to Back" button, I started from the bottom and moved my way up on a stack of Managed Metadata fields, sending each to and the back in turn. The end result was that all of them show their dropdowns correctly, and none goes "behind" adjacent controls. All five are on a panel, as well.
From the screenshot below, you can see visual cues showing that the selected control is not "on top". Looking at the top most edge selectors, you can see that the outline of the above control overlaps onto the yellow circles and square slightly, where it does not do so on the bottom-most edge selectors. This shows that the control directly above the selected on is also above it on the z-axis.
(Nintex 2016 withSharePoint 2016 on-premises)
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