STR:
Configure a custom sub-object to the Idea Object (and add api ref for MUX)
Configure a custom number attribute with zero decimal places (and add api ref for MUX)
Configure validation range (eg 1 to 5)
Add the attribute / field to the blueprint
Navigate to the Idea Object / sub-object list view in MUX
Create an instance of the sub-object
Enter a decimal number (such as 0.4) into the custom integer field
Expected Result:
Enter an integer with zero decimal places
Actual Result:
Use decimal places or less
See screen shot: