X cariage moves slightly along the Y axis while homing X axis

Whenever I home the X axis the whole X cariage moves a little bit along the Y axis. I tried to loosen the belts because I thought they were too tight but it didn´t change anything. I don´t really have any experience with this sort of stuff and when I tried to look on Google for the answer I couldn´t find anything so this is sort of my last resort. I have a VCore 4 500 IDEX but since the manual said so I didn´t put the Hybrid belts on yet.
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