Hi there.
First off, awesome work on this plugin! I’ve using it across a handful of sites that I manage for a few years now with good results.
A recent update you pushed seems to have caused a display error with the borders of menu items that have a sub-menu. Check out my screenshots for a visual:
https://drive.google.com/file/d/1MoYOWaA6DJluaJVmz1ph7pH8OHhwV6q1/view
https://drive.google.com/file/d/1Pwo8SWzg1tq-nPwgMmoOU52ourh8L1pA/view
I can confirm this is a plugin update that is causing this display error because when I tested other sites that use your plugin, the menu borders appeared fine until I applied the available plugin update.
Please let me know if there’s anything I can do to help you get this fixed.
Thanks!