Possibly from allowing sunlight into the building which heats the interior. Air conditioning must work extra hard to overcome the heat.

In the case of Denuvo, it is proven to drastically decrease performance for the sake of “security.”

Examples:
Hogwarts Legacy Denuvo vs Crack

Resident Evil 8 Village Denuvo vs Crack

If you get the crack from a reputable source, you can trust it will be safe. A low seed torrent from a shady place (like The Pirate Bay) is probably a virus. High seed torrent from another source like 1337x or something with more active moderation is generally safe.

If you want to be extra sure, spin up a VM and install the crack there and check it out before doing it on your real machine.

Prowlarr is better than Jackett, especially for setting up Sonarr and Radarr.

Weird. If your RPMs increase during these slow downs then it’s from engine braking.

It could be that your car is downshifting for the uphill and then remains in that lower gear for the downhill, causing unintentional engine braking.

Are you using cruise control to set the speed? If so, it could be engine braking to keep it at the desired speed. Some cars do this, some don’t.

you’re on the piracy community… what do you expect to see here?

Check ipleak.net to see if there’s identifiable info coming through. Use their torrent check as well.