Rich Text Box Control config is blank but the control contains text, a table and references

[anneliese]

I'm using Nintex for SP 2016 and current Chrome browser for a responsive form.  I have a Rich Text Box control with text, a table, and references in it, but when I try to make changes to the control, the configuration panel is blank.

If it makes any difference, the RTB is nested in a Panel control and the control shows up fine in a published form.

The control as it shows in the Nintex Forms Designer:

When I try to edit the control, it's blank:

I've tried closing and re-opening the form, closing and re-opening the browser, and clearing the browser cache.  Anything else I should try?

Thank you,

Anneliese

[anneliese]

Since I haven't seen any suggestions I guess my best bet is to delete the control and re-create it. I've noticed problems with panels nested inside of panels and perhaps this is a similar issue since it's a rich text control nested in a panel.