Images with a glitch and very high cpu and RAM

Hi everybody,

I'm a Lightroom user with a MacBook Pro 2,3 GHz i9 8 Core Cpu and 16 Gb Ram.

I'm experiencing a very high usage of CPU and RAM even if I'm just scrolling through the gallery (like 160%), and if I edit some images, sometimes I get that my photos appear to be glitched, with red and green stripes on them, but only the photos, not the entire screen.

Any ideas on what could it be?

[Moved from ‘Bugs’ to ‘Discussions’ by moderator, according to forum rules. A ‘bug’ is not just another word for any problem with software!]