I watched the video and immediately tested it on my iphone. It's true?? About 50% of the time, typing "Thumb" resulted in "Thimb" or "Thjmb", while the visual feedback on the keyboard showed u being pressed instead!

Other comments here say Predictive Text is the culprit, but I already had that off. I also turned off Slide to Type. Same result.

I had just sort of assumed it was me, but yes, this happens on my phone too. If i type very quickly i see the u feedback and i get an i or a j.

First notepad.exe gets a rce then this, is it the bottom, sadly I think not…