Welcome back after the holidays and Happy new Year!
As far as I know, ALL the caretakers have seen the pop up message that informed them to breed a white/red Dragon, while the "unforseen formatting issue" prevented them from breeding the wanted Dragon.
Most of the caretakers don't read or don't participate in the forum and probably don't even know that they were impacted.
They just followed your "misleading" pop up info and for their breeding fails of another Common Event Dragon that has the behavior of an Ultra Rare one they put the blame into the bad luck once again (which is wrong) and not into the bad code and your mistake (which is right).
You suggest a case-by-case assistance solution, which, maybe, isn't wrong, by just replying on this thread, without even a sticky announcement, and that's all!
Why don't you send a new massive pop up to inform ALL your caretakers about the whole problem, asking them to contact you in case they were impacted?
I am sorry to say, but you chose a very convenient for you way, which is rather disappointing once again... :-/