Hello Philip,

I have created a support ticket for this issue with number CAS-78199-WWMBML.

I have investigated your issue “Submenus are expanding of the middle of the control” and, I have asked our engineering staff to examine this further.  To ensure that it will receive attention, I have logged this behavior in our internal tracking system with a Development ID of 98650.  The next step will be for a developer to review my investigation and confirm my findings or to offer a fix, or other resolution. 

I will leave this case open and update you with any new information after the review.  You can also continue to send updates to this case at any time.

You can view the status of the development issue connected to this case by going to the “My IG” tab on our website, hovering to the "My Support Activity" dropdown and selecting the "Development Issues" tab. 

Please let me know if you need more information.