Where are you seeing the first one? The second one is happening to me as well but only for that page. I seem to be able to get the preview for other pages. Maybe the issue is the use of displaytitle? That is the only difference between that page and all the other pages I checked. Although it isn't like I did an exhaustive check.
When they say they will look into it, it just means they have noted the problem. There is not standard timeline for when it will get fixed. It seems the UCP has put most other issues on hold. A lot of other recently-discovered bugs have been going without fixes as well.
Laclale, when a thread is this old, please make a new one.
That said, Try again in a few hours. Contact us again in 12.
Sometimes odd things like this in the middle of the night (or whatever time of the day it is in your part of the world, so take note) are IRL connection issues. Servers on maintenance "hiccupping" or nodes down due to RL problems. If it is a FANDOM-side problem, techs are bound to already be on it.