I've been having this problem recently off and on. Often when I bring up a text box to type in (regardless of what app or keyboard) I will enter letters, but they will not appear in the text box at all. The letters I push flash to show that it acknowledges the input, but the text box will remain blank. Usually if I keep spamming letters it will eventually start working again randomly. It won't log all the letters I've spammed, but it will suddenly start to actually transfer the new ones to the text box. Occasionally, I'll spam for a long time, though, and there will never be a response. I've googled regarding this issue, but I haven't found any answers. Has anyone else experienced this problem? Do you have a solution? Thanks in advance.