Question Minecraft FPS drop after playing for a while ?

Jun 6, 2020
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Hi everyone. Not sure if this is the right place to post, so if it isn't please let me know.
So, I have a pretty decent PC , but when I play Minecraft with shaders it drops to 50 or even 30 fps (from over 170-230 without shaders). The weirdest thing is that when I select the shader it runs fine for a couple of minutes (until I load more chunks of the world I think), at around 90-110 fps (depending on Sildur's, Seus or Chocapics shaders). This even happens with "Low" versions of the shaders.
Any idea of what could it be/what can I do?
My PC specs are a Ryzen 5 2600, a GTX 1650 SUPER, and 12gb of RAM (3x4gb, tried with 2x4gb and same issue) running at 1080p