[toast0]

That's annoying, but I think what's worse is these:

Start typing a word, see the thing you want, finish the word, it disappears.

And

Start typing, see what you want, stop typing and hit enter, but it changed to something else between when you saw it and when you hit enter.

[rincebrain]

Yes, I've had a number of these.

One of the most annoying ones combined these two properties, so depending on various internal races, typing a four letter word would either open one program, the folder that program was installed in (!?), or attempt to Bing the common word