Can't use expressions inside of expressions

[HYPExMon5ter]

Describe the bug

entitytypes property bukkit form:
    get:
        broadcast "Expr: %expression 1%"
        set {_type class} to try expr-1.getType()
        loop ...BukkitEntityType.values():
            return loop-value if loop-value.getEntityClass() is {_type class}

blocks property (creature|mob|entity|monster) type[s]:
    return type: entitytype
    get:
        return bukkit form of (expr-1.getState().getSpawnedType())

    set entitytype:
        broadcast "Change value: %change value%"
        broadcast "Bukkit change value: %bukkit form of change value%"
        #broadcast "Expr: %expression 1%"
        set {_state} to expr-1.getState()
        {_state}.setSpawnedType(bukkit form of change value)
        {_state}.update()

command /test:
    trigger:
        player's targeted block is a mob spawner
        send "%bukkit form of cow%"
        set mob type of player's targeted block to ("cow" parsed as an entity type)

The entity types expression doesn't get called inside of the blocks property expression, however is gets called when in a command.

To reproduce
Code above

Expected behavior
The entity types expression should get called when the blocks property expression does

Server information

• skript-mirror: 2.0.0
• Skript: 2.4-beta5
• Server version: 1.13.2 PaperSpigot