[REACT] Milestone Resize Error

[glcark]

When hovering to the bottom left of a milestone and clicking & dragging to resize an error is thrown.

Uncaught TypeError: Cannot read property 'firstElementChild' of undefined

This breaks future sync attempts.

[mats]

I cannot reproduce this, can you see this bug in any of our samples?

[glcark]

https://www.bryntum.com/examples/gantt/basic/

Go to the make backup milestone. Try to resize from the bottom left.

[mats]

Thanks, reproduced. Ticket: https://github.com/bryntum/support/issues/2635