Anyone with diabetes using Huel? Help!

Hi everyone, I'm t1dm and a fairly new user of Huel and up till now, I've only really used H&S - I've found it's great for lunches and doesn't need much insulin before. So, I thought I'd try huel powder in the morning for breakfast.

The blood sugar spike is absolutely bonkers. I've tried taking my insulin much earlier and upped my ratio but even then I end up with a big spike. I've joked to the other half that it's better than glucoshots for low BG!

Not seeing this low GI at all. Any advice appreciated!