In 25w05a, the position in the lodstone_tracker (and the uuid in profile) item data component requires explicit snbt array type qualifiers [I; 1, 1, 1], which was not the case in 1.21.4.

The command from 1.21.4 no longer works in 25w05a:

/give @s compass[lodestone_tracker={target:{dimension:"overworld", pos:[1, 1, 1]}, tracked:true}]

Instead it now has to be:

/give @s compass[lodestone_tracker={target:{dimension:"overworld", pos:[I; 1, 1, 1]}, tracked:true}]

Which looks like a regression/unintended and is inconsistent with other data component number arrays