Item Crack Particle not working

[Runakai1]

Information:
Skript: 2.5-alpha3
Paper: 1.15.2

using play stone breaking at target block
works fine. However using
play tool breaking at {_spawnloc} to the player
doesn't. (the spawnloc variable is working fine, as other particles spawn)
play 10 bow item breaking at target block
throws no ingame error.

Console error:
https://pastebin.com/3UsvftAh

Code:

command eating:
	trigger:
		set {_v} to vector from yaw 45 and pitch 45
		set standard length of {_v} to 0.5
		set {_spawnloc} to player's head location ~ {_v}
		send "%{_spawnloc}%"
		play 10 bow item breaking at target block
		play mob spawner flames at {_spawnloc} to the player```