Yes - I see what you mean. There is an odd little jump backwards by the cursor once you do return, - but only (it seems) in chrome and if the spell check is enabled. Placing the cursor where it should be after the jump seems to stick (most of the time).
I replicated it in the test page I made earlier, which has no extra baggage attached to it, so it seems this is a small bug - unless we are missing something.
Hopefully Jason & Co may be able to look into it and advise.