It was my experience with the libre 2+ and the libre 3. I’ve never used the libre 1 so I couldn’t say if it applies to that one. That said the 2 and the 1 don’t really qualify as CGMs as you need to poll them for glucose readings and I believe they’re limited on polling frequency (something like once every 5 min) so they’re much closer to a traditional glucose monitor than they are a true CGM.