Different behavior in the creation column using the gantt deafult and addnewcolumn columns.
When we pass the column type to the gantt.columns config, it can then be obtained via gantt.columns.allRecords[0].type.
If we create a column via AddNewColumn, then the created entity does not have the field "type"
I redid the appeal via this.constructor.type (static call). But it may still be unexpected for someone
Support Forum
Thanks for reporting, Reproduced! I've created a ticket for that. Here it is: https://github.com/bryntum/support/issues/5184
Good Luck ,
Tasnim