[QUESTION] Guitar Pickups make weird whistling Noise

Hello everybody,
I recently bought a Harley Benton Fusion III HH FR and I really love the Guitar. The only Problem I got with it, is that when I play on a high gain setting, the guitar starts making a weird whistling sound as soon as I am anywhere near my amp. It’s not like a feedback sound and it even starts doing it when the gain is not that high up and I am muting the strings. It also is always the same frequency and only appears in humbucker mode and not when the coils are splitted. I guess the pickups in the guitar are not the best (Roswell HAF-B AlNiCo-5) but I was wondering if I can do anything other than changing the pickups.
Thank you all and have a nice day!

submitted by /u/antongrh
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