Well, the Big Bangers response to this is:
“This is an anomaly, but since BB gets everything else right it must be true.”
Then observers find out another prediction that is wrong and BBers respond:
“This is an anomaly, but since BB gets everything else right it must be true.”
Repeat ad absurdum.
Until the little boy says ”but the cosmologists are naked!” then everyone starts laughing. This has not happened yet, but it will at one point.
