Siri: "I can't update reminders. Sorry about that." Why? I use Siri to set reminders a lot, like a dozen times a day.

This morning Siri is saying, "I can't update reminders. Sorry about that."

It happens on my Watch, my phone and my iPad. I've tried switching them off and on again.

It may be only for certain reminder lists. "Put cake on my shopping list" fails, but "In five minutes, remind me to do that thing" works.

There are a lot of old items on the Shopping List; I've tried deleting a few, but that didn't help. I've also tried making a new empty list and adding items to that, but that fails too.

I can use Reminder lists in the app on the phone without any problems.

What's going on and how do I fix it?



Update: I've just found that "Add cake to my shopping list" works, but "Put cake on my shopping list" doesn't. What!? Siri clearly understands what I'm requesting, since the error is, "I can't update reminders".
Apple's new Siri has a huge flaw that will effect many users like myself which is speed of internet.

Siri still runs over the internet to translate what you say into a usable set of actions. Therefore if your internet is not fast enough/gets interrupted from your ISP, Siri will respond with errors.