did you have the HADS activated?

well i didnt touch the controlls.

If you have the HADS activated the TARDIS will dematerialise if you enter combat shortly after exiting. If you have the HADS randomizer on it'll land somewhere random. If you don't it'll land in the same place after you defeat the enemy. The HADS and HADS randomizer can only be turned on and off with the MCM menu.

I But if it is still there but you cant see it. go back inside travel to whiterun or one of the big citys and save and restart your game.

open the non-SKSE skyrim threw your steam library so your mods update, the diapearing tardis after exit is a april fools joke and maybe you just didnt update since the joke