Inverse gambler's fallacy
The inverse gambler's fallacy, named by philosopher Ian Hacking, is a formal fallacy of Bayesian inference which is an inverse of the better known gambler's fallacy. It is the fallacy of concluding, on the basis of an unlikely outcome of a random process, that the process is likely to have occurred many times before.
Source: Wikipedia — Inverse gambler's fallacy (CC BY-SA 4.0)