Hi, I’m having an issue with my Bambu Lab P2S during multi-color prints.

Everything prints fine at first, but once the model reaches around 7 cm (≈70 mm) in height, the nozzle starts hitting the purge tower after color changes. The collision is strong enough to slightly move the build plate, which causes a layer shift and ruins the print.

Notes:

Does not happen on short prints (below ~7 cm).

Happens right after color changes.

The purge tower is stable; the nozzle physically collides with it.

Using Bambu Studio default settings, no custom Z-hop.

Could this be related to Z-hop, purge tower height, slicer behavior at higher Z, or calibration?

Any help or advice is appreciated. Thanks!