Hi,
Go on basic demo : https://www.bryntum.com/examples/calendar/basic/
Add listener event click :
listeners:{
eventClick: (data) => console.log('click'),
},
Open debuger and switch to iPhone X for exemple.
On the first click : We have two events in the console
All futur events click will not worked ! (Only double click).
Tested on React, same problem.
(With the 4.0.1, all is ok on React & Web)