I got this too. I think it’s a bug in our user profiles - local inference for shit like opening apps should be fast, but instead it hands off to ChatGPT or something and fucks around for like 8 seconds.
Try Settings > Siri > Turn off Siri, then turn it on again.
When I did that it asked if I still wanted to be in the beta (what beta did I sign up for?!). I said no, and it finally reverted back to being fast-but-shitty, which is better than slow-and-shitty.