Looking forward to a fix!
Just to increase the database, I'm running Win 11 on an AMD Ryzen 9 5950X (also not overclocked) with 64 GB of DDR4, slicing for a heavily modded Ender-3 Pro.
I can't legally include the file I was slicing, but it's a plate of nine "dungeon tiles" for tabletop gaming (squares of stone flooring with attached walls). In 5.4, it takes 1 min. 5 sec., but in 5.5 it takes 5 min. 47 sec.!