Nether portals generate underground and on top of trees

Playing with snapshot 20w19a single player on OSX 10.13.6.

This may be working as intended but nether portal generation seems to be doing odd things with the y axis.

I made a portal in the overworld (-126, 63, -18) and it sent me to a portal it made up a warped logs tree (19, 55, 6.7)

I made another back from the nether (-44, 46, 31) to the overworld and I was sent underground (-380, 20, 248)