Device completely freezes when placing a sign

I don't know if it's the recent Android update or something else, but recently the phone freezes whenever I place a sign. The GUI comes up, but not the keyboard to edit the sign. Steps:
1. Place a sign.
That's all you do, but only the GUI shows and not the keyboard. The phone then turns black and does not come back on. All I can do is take out the battery and put it back, then turn it on.