Later I realized that not only I am facing this problem but there are other kindle oasis users too, who are facing the same stupid issue. (thedevicesupport.com)
The new kindle oasis model is totally waterproof with the IPX8 rating. (thedevicesupport.com)
bluetooth with ability to play audiobooks in mp3 format so that you can rent audiobooks from the library and play them on the device (the new kindle oasis can not currently do this). (goodereader.com)