[Nero_3D]

sscanf is unable to verify if the given variables matches the specified pattern
I think in your case it simply overwrote up to 29 cells before "text" in the stack because you declared "text" with only 1 cell

Код:

new
	query[400],
	Float:x,
	Float:y,
	Float:z,
	text // you forgot to add [30] here => text[30]
;