Will it affect the network speed if you find a bug in the router?

It is likely to be affected. It is not excluded that some original parts are burned.

The word BUG means fragile. . . In fact, the earliest computer, because of its huge size, will have many bugs entering the original circuit of the computer, causing the circuit to burn down, so this word is used to describe it and has been used in the current program or hardware industry.

So what is certain is that bugs are very harmful to electronic equipment.