Maybe you know what is going on? Or your ping list? iPad help.
I’m posting this on my iPad Pro with the latest updates loaded. I have no problems with editing, scrolling, selecting, or cutting and pasting text in the edit screen. Have you done a hard restart of your iPad recently? The few times I’ve had such a problem in Safari, either restarting Safari or the entire iPad solves the problem. . . and doing the hard restart is best as it flushes the RAM.