Have you found a solution to this? I'm surprised no one has helped.

After having set the DataChangeIn and Out on a GT title we've been using today thinking it'll be a nice little polish to our show, I'm running into the same issue. I have a lower 3rd title that has TransitionIn and TransitionOut animations, and I have DataChangeIn and DataChangeOut set up on the text lines so if anything changes the line fades out then fades back in with the new data. BUT - if it's transitioned out (not on screen) and I touch any of the data lines, it pops up. Doesn't transition in, just pops on screen. Now we don't change the lines in vMix, we do API commands through a custom written interface that sends new data to the L3. This works about 99.8% of the time perfectly. If the L3 is trans'd in, on screen, and we do a data change, the lines fade out and in no problem. If we trans the L3 in with new data, it works fine - mostly. There are occasions where I will trans in the L3 with new data, and it'll pop on the screen with the old data, change the lines (fade out and in), then pops off and transitions in like normal. Almost like the data change is reaching vMix before the transition IN command and it's reacting to the change. Otherwise there's no rhyme or reason. I could go through an entire show without hiccups, but occasionally it does it for no reason.

It should be quite simple. If the data changes while a title is transitioned out, it shouldn't automagically pop on the screen! That's absolutely no way to run a production. If I can't find a solution I'll probably have to turn off the DataChange animations and go back to having the changes just pop on the screen. Boring!