I haven’t heard about it

들어본 적 없어요

I haven't heard anything about these problems so far.

Another Gold for Bolt as World Championships End (Published 2013)

Usain Bolt secured his third gold medal of the world championships by running an upbeat anchor leg to secure the men’s 4x100-meter relay for Jamaica.

https://www.nytimes.com/2013/08/19/sports/another-gold-for-bolt-as-world-championships-come-to-an-end.html#:~:text=I%20haven't%20heard%20anything%20about%20these%20problems%20so%20far.%20