HI
Whenever i select the month june in Custom Date Picker . It selects July (It happens first time after that if at same time only selected it selects june).
Steps to Produce
Select task - Schedule
Edit Task
Custom Date - Select June Month Directly . And you will see it got selected July .
It's up to you. The code should be executed once when the application starts. Note, imports should be adjusted according the way you import bryntum classes in your app.