Well that is what happens to me nearly so the answer must be no.
Let's try to help each other here. Snobby, snotty answers don't help!
I personally use loop for nothing more than 100% crop/ zoom of an image. Instead of using the loop tool, try putting the pointer on the point you want to repair and press the "z" key on the keyboard. This will zoom on the selected area to 100% and still allow you to use repair.
Not quite the answer you are looking for, but I hope it helps!