Make mob move to or jump to 'perch'

I'm trying to make a dragon boss monster that will land on a pill of polished Blackstone slab bricks, but the commands supposed to make it do so just... don't?



I've tried the minecraft:behavior.jump_to_block component and that just makes it do a patheic half block bounce and go nowhere.
Then I tired minecraft:behavior.move_to_block and that just doesn't do anything.



i even tried copying the code right from the bee and it didn't do anything.

This is the test script I have:

component group:
"minecraft:behavior.move_to_block": {
"priority": 0,
"search_range": 16,
"search_height": 10,
"tick_interval": 1,
"goal_radius": 0.1, // was tested with 0.4 when the goal radius wasn't squared. sqrt(0.4)~0.633
"target_blocks": [
"polished_blackstone_brick_slap"
],
"on_reach": [
{
"event": "minecraft:dragon_off_ground_event"
}
]
}

Event Caller:

"minecraft:switcher_event":
{
"randomize":
[
{
"add": {"component_groups": ["minecraft:dragon_fly"]},
"remove": {"component_groups": ["minecraft:dragon_on_ground"]},
"remove": {"component_groups": ["dragon_perch"]}
},
{
"add": {"component_groups": ["minecraft:dragon_on_ground"]},
"remove": {"component_groups": ["minecraft:dragon_fly"]},
"remove": {"component_groups": ["zgkb:dragon_perch"]}
},
{
"add": {"component_groups": ["zgkb:dragon_perch"]},
"remove": {"component_groups": ["minecraft:dragon_fly"]},
"remove": {"component_groups": ["minecraft:dragon_on_ground"]}
}
]
},

Any Idea what I'm doing wrong?