I have noticed, since updating to Beta 4 (OTA), that some text fields in Safari cannot have anything pasted into them. For example, I will copy a URL and then want to paste it into a field on a site and I cannot get the "paste" option to appear when I tap in that open field. This has happened on a few different sites, that I've noticed, but these same actions totally worked before the Beta 4 upgrade. Has anybody else noticed similar behavior? What could be causing this?