macOS Sequoia (v15) and popup menu bugs?

[Paul Dupuis]

We have a confirmed report of a customer experience a repeatable hard 
crash of out application on macOS Sequoia (15.1.1) when trying to invoke 
a right-click context menu. We implement context menus by a Frontscript 
that looks at mouseDown, and, if it is a mouseDown with the right 
modifiers for a context menu, handler it or passes mouseDown. If it 
handles it, it modified a button called "popup" to contain the correct 
context menu items based on what was clicked on and the invokes: popup 
btn "popup" of stack "cm"

Our app is built under LC 9.6.13. I searched the Livecode Quality Center 
(bugzilla) for any bugs related to Sequoia, but found nothing. It works 
on macOS Sonoma without any crash. We do not currently have a Sequoia 
system to test on.

Has anyone experienced a crash with a popup menu on Sequoia? Any insights?