Hi Adam,
Thank you for using Syncfusion products.
We regret to let you know that, we have prepared a sample with mentioned controls loaded in it and tried to reproduce the reported behavior. But we could find Context Menu gets displayed in proper location in all aspects. Could you please check with the sample, video attached in following location?
Sample Location : http://www.syncfusion.com/downloads/support/directtrac/general/TreeViewAdv-ContextMenu-319379060.zip
Video Location : http://www.syncfusion.com/downloads/support/directtrac/118199/ContextMenu1870014026.zip
If you are still able to reproduce this reported behavior, Could you please guide us with more details like, sample that can helps to reproduce this reported behavior? That will be helpful for us to analyze and provide prompt solution as earlier as possible.
Please let us know if you need further assistance.
Regards,
Senthil kumaran