Lag spikes/freeze since s21

Since season 20 i got random lag spikes. Sometimes it happens after i open rift sometimes in town.

i am already bored with losing HC characters because of D3 freezes. It is fine if it last for 1-2 second but 10 seconds of freeze = dead

Not enough information to really know what the problem is that is causing that. Could be one or many reasons. Could be your internet service provider or your computer, or your wifi equipment or the D3 servers, who knows… You can get more help here:
https://us.forums.blizzard.com/en/d3/c/technical-support/25

Good luck.