Issue with updating DueDate after modifying StartDate in a handler in Creatio

Hello everyone,

I’m working on a solution that automatically adds 15 minutes to the StartDate and assigns this new value to the DueDate attribute in Creatio. The issue is that although the logs show the correct date (after adding 15 minutes), the DueDate value is not updating on the page, and I still see the old value.

Here’s my code in the handler:

javascript

handlers: [
  {
    request: 'crt.HandleViewModelAttributeChangeRequest',
    handler: async (request, next) => {
      if (request.attributeName === 'StartDate') {
        const startDate = request.$context.StartDate;
        console.log("StartDate before adding minutes: ", startDate);
 
        if (startDate) {
          // Add 15 minutes to StartDate
          const newDueDate = new Date(new Date(startDate).getTime() + 15 * 60 * 		  1000);
          console.log("DueDate after adding 15 minutes: ", newDueDate);
 
          // Assign the new value to DueDate
          request.$context.DueDate = newDueDate;
 
          // I also tried using $set to update the UI
          try {
            if (request.$context.$set) {
              request.$context.$set('DueDate', newDueDate);
            }
          } catch (error) {
            console.log('Error with $set method:', error);
          }
        }
      }
 
      return next?.handle(request);
    }
  }
]

• The logs show that the date is correctly calculated, and 15 minutes are added 
• However, on the Creatio interface, I see that DueDate is not updating.
• Even though I tried using the $set method to update the value, it still does not work.

**Has anyone encountered this issue before? How can I ensure that the DueDate is updated correctly on the interface after modifying StartDate? Any suggestions would be greatly appreciated!

Thank you in advance!