Hi, Bryntum support
I'm updating Bryntum Gantt to V5 for our product.
But, I'm facing a problem that undo/redo is often broken in V5 with the error below.
gantt.module.js?457330:68 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'get')
at F.equality (gantt.module.js?457330:68:789031)
at EngineTransaction.onQuarkCalculationCompleted (gantt.module.js?457330:68:417017)
at EngineTransaction.calculateTransitionsStackGen (gantt.module.js?457330:68:420674)
at Generator.next (<anonymous>)
at EngineTransaction.calculateTransitions (gantt.module.js?457330:68:418661)
at Generator.next (<anonymous>)
at runGeneratorAsyncWithEffect (gantt.module.js?457330:68:385855)
at gantt.module.js?457330:68:415583
This is reproduced in your demo app https://bryntum.com/examples/gantt/advanced/.
I can't find out the exact condition to reproduce it. But, it happens very frequently while I edit Gantt charts.
This is similar to viewtopic.php?f=51&t=19407&p=95948&hilit=onQuarkCalculationCompleted#p95948. However, this problem seems to occur much more frequently.
I think this bug is critical and it blocks us from updating Bryntum Gantt. So, could you fix it? And, if it takes more than a month, could you please tell me a workaround for the bug?