[Quick 7] Casts No Longer Work With Discriminated Entities

[homestar9]

I discovered an issue when playing around with discriminated entities where casts no longer work, specifically the JsonCast@quick.

If I assemble the entity like this, casts work:

component 
    extends="quick.models.BaseEntity" 
    accessors="true"
    table="MaintenanceTask" 
{

    property name="data" casts="JsonCast@quick"; 

Output: "data":{"rowsDeleted":0,"targetDate":"June, 25 2023 13:15:59"}

If I assemble the root entity like this, casts don't work:

component 
    extends="quick.models.BaseEntity" 
    accessors="true"
    table="MaintenanceTask" 
    discriminatorColumn="name"
    singleTableInheritance="true"
{

    property name="data" casts="JsonCast@quick"; 

Output: "data":"{\"rowsDeleted\":0,\"targetDate\":\"June, 25 2023 13:17:27\"}"

Note: I tested this issue all the way back to Quick 5 and can replicate it.