Yes, I've created quite a few projects, even just now, all in 10.0.3 and every time I open the project, all parts of the video with titles over it, always re-render. Quite a bugger if it's a complex render with other multiple tracks & transitions.
I make a habit of opening FCPX & doing something else while I wait for it to render all the titles again.
I haven't really complained about it because at least now the titles do seem to render what's actually in the title - which is progress of a kind ;-)
One funny thing I noticed, considering how much trouble we had with the title rendering bug, is that one time the thumbnail that shows for a compound clip (that has a title in it) renders the word "Title" instead of what the title actually is - which is similar to the old bug. It renders correctly & everything is correct, just the thumbnail showed "Title". Maybe it's on purpose.