Slowdown in A Linkt to the Past

[CortexVacua]

Pi Model or other hardware: 3,
Power Supply used: Official 2,5 A Power Supply
RetroPie Version Used: 4.1
Built From: Pre made SD Image on RetroPie website
USB Devices connected: None
Controller used: WiiU Pro Controller
Guide used: Github
Emulator: lr-snes9x2010
How to replicate the problem: Play Link to the Past and hit a Tree with bees or dash through grass, when there are lots of sprites already on the screen

So I did not notice any slowdowns on snes games up until now that I am playing through ALttP. Usually the game runs pretty well, but as soon as there are too many sprites on the screen the game slows down for a split second, while it still draws every frame. While video slows down, sound plays normally, as if the game was running perfectly. I don't remember if the original had slowdowns in this kind of situations, bc I was a kid when I played it. So my question is, is this some kind of accurate emulation or is this just bad emulation? I haven't had time to try other emulators, but I don't consider them a real option seeing how the sound while playing without hickups, still sounds off (wrong pitch etc.) on every emulator except lr-snes9x2010.

Thanks in advance
Cortex