On my account I failed breeding a Coral dragon for Dragon Tales. Tried from the beginning of Dragon Tales repeatedly and had no choice but to skip it or not be able to complete Dragon Tales. This is a common occurrence for friends and family and spans multiple accounts and multiple Dragon Tales. I don't need to tell anyone how ridiculous this is when outside of Dragon Tales, commons would be the breeding result 90% of the time.
I am currently on a double digit loss streak for the Inquisitor in the arena tournament and have been on it for a full day now. This is a common occurrence for friends and family and spans multiple accounts and multiple tournaments. It is not uncommon for 25% win chance dragons to rack up 20+ loss streaks against level 20 champion dragons (these 25% chance dragons are the best you can do against lvl 20 champs). I've had 60-80% win chance dragons rack up double digit loss streaks.
There is a problem here and the developers need to know about it (if this is unintended). The odds of these things happening consistently really get out of hand when you start doing the math. The best thing we can do is post these experiences in a thread.