about the Mountain Zone, ill look into the collisions of those objects i probably missed those.
for the Lagoon Zone, those arent bugs, only certain waterfalls emitted splash effects in the original game, the misplaced object was there from the original game aswell, and the spot with no water in the giant tree is intended.
ill look into the jump height, no one ever mentioned it feeling off till now
and dont worry you can ask questions here aswell, just thought id offer discord cause its more convenient usually