In game display titles comes up as computer code?

Nasaw_72

Hi all,
I've recently been having the crystal and gold amount displaying some sort of computer code, instead of the normal amount of gold and crystal that I have collected from gameplay. My phone has been having heating issues too is the display problem a part of the issue?
If anyone has any helpful feedback I would appreciate it.
P. S this is my first post forgive if the picture attachment does not work.