where there is a difference of opinion,e.g. with eye drops because to present something as invalidating the fast where there is an element of difference amongst the people is wrong= you can't state as fact unless you have undisputed evidence by the majority of the people.

Similarly, to say that listening to music is wrong and should be avoided is one thing. But to class it as something which invalidates the fast is an innovation (since it is not in the lists of what breaks the fast) and innovation (bid'ah) is haraam.

Please take care when advising fellow Muslims in this manner.