tl;dr if an attacker can flip certain bits in one of the last phases of a SHA3 execution (e.g. through power glitching on a device) and can compare the result with that of a correct execution, the internal state of the function can be fully recovered. With short inputs, the whole input can be recovered. This may pose a risk for MAC protocols where the attacker might be able to reveal the secret.

Nothing to worry about outside of the hardware world.

Hardware world? Do you mean the DDR4 ram in the hardware in your server? An example of how bits can be flipped in modern hardware is the Row Hammer Attack- https://en.wikipedia.org/wiki/Row_hammer

can someone please tl;dr?