Imported footage stretched lines glitch

Hey everyone, 

I recorded some footage with my mavic 2 and was trying to edit them inside premiere pro along with other videos shot with my camera. When imported, the drone footage would appear in smaller size with elongated lines throughout the screen. At first, I thought that I might just need to change the sequence settings and adapt them to the drone shots only, but even after that nothing. Did anyone ever encounter this problem? Been looking for answers everywhere and could not find any. Thanks in advance!