I had to use a bluetooth keyboard to be able to add name. Even it stopped to crash while adding names to saves.
It probably not recognize the samsung android keyboard well.
I'm using Samsung Note 10. I just try it and found how to make it work for sure. You see the auto replace words when you type anything ( the thing above the keyboard to help you fix mistaken words or show the rest of the word you want ) When you type the name, click on it than press enter ( it work for me right away like that )
Also, It can go throw if you put space at the end ( though, for me it delete the name but it make me start the game ^^; )
I didn't save the name, I just start and put the name there ^^
Hope this help =)