Behaviours Mapping to selected Issue Type not working

Steps to reproduce the problem:

1. Create a behaviour mapping to project AA and issue type Bug only.
2. Set description field to required using the UI toggle option.
3. Go to Create Issue and change the issue type to Bug. We can see the description field is required but don't enter any value in it and click submit.
4. You will force to enter the value in the description. Now, change issue type to Epic.
5. Click submits to create the issue but you will not able to proceed.

Demo - screen recording 2020-08-18 at 3.48.56 pm.mp4

Expected Behaviour

The behaviour mapping should run based on the selected issue type.

Workaround

1. Set to all projects and issue type mapping.
2. Add the script below in the Initialiser section:

   def field1 = getFieldByName("Field Name 1") // change field name 1 to the valid field name
   def field2 = getFieldByName("Field Name 2")
   
   if(issueContext.issueType.name == "Task") //issue type that will trigger the field required
   {   
       field1.setRequired(true)
       field2.setRequired(true)
   }
   else
   {
       field1.setRequired(false)
       field2.setRequired(false)
   }