Hey you should probably upgrade your firmware.
I was suffering the same problem.
-> https://wiki.bambulab.com/en/p1/manual/p1p-firmware-release-history
in P1 series Version 01.09.01.00 (20260114)->
Fixed an issue where print jobs could be sent successfully in LAN mode, but the printer would not respond.

here is the bambu guide:
-> https://wiki.bambulab.com/en/p1/manual/firmware-upgrading