Pretty much every text edit/note app I've used works this way. I'm pretty sure it's a part of the API that almost all developer's use.
Then again, Notes is not my most used app, so I can't say I tested it exhaustively.
Since you are jailbroken (if memory serves), you might be running that version. If the problem is consistent enough to test, you might try turning OFF the Speak option and see if it makes a difference.
And though I hate make suggestions on a topic I have no experience with, it might be worthwhile to review any tweaks you have going that would affect the keyboard or text editing environment.
I find it hard to believe that Notes is that glitch prone, and yet the problem remained below the tech blog (and my) radar. Though I suppose I could have simply missed those articles and posts. Can't read everything.
Last edited by twerppoet; 06-16-2013 at 02:18 AM.
I switched away from native Notes because I had trouble with a file maybe a year ago: It repeatedly failed to save my updates, then the file disappeared. I still have some old notes on the app, but I don't count on it like I do with Evernote or Notability.
I don't trust Apple's Notes enough to put anything important in there. And the "Cut" feature does seem iffy all the time, not consistent. I've never had that problem with any other App. I use it now mainly for just a grocery list and other minor things. It does sync well across all my devices and that's important to me. But I'm really beginning to think maybe Notes is just having some hormonal problems.