Character fall out of landscape every time it teleport



I’m working with Landscapes and every time the character teleport to a new position it falls out of the terrain. I figure that is has to do with the collisions on the landscape, which are set to “BlockAll”. I tried all the possibilities there and with some the teleport ring doesn’t appear and with the ones that did appear the character fall out of the landscape. I don’t know what to do in this case? I tried using a NavMesh but I have the same outcome. can someone help me with this please? any help would be highly appreciated.

Thank you