blood sugar not rising or lowering after meal

Hi @static192 Did you take a correction as well as your bolus ? Butter would delay carb absorption but apart from that no rhyme or reason springs to mind..

I have experienced this on quite a few occasions, and when I say that I mean within 1mmol........

its just a lucky match of dose and timing.....

not changing even by a fraction of a mmol isn't an achievable target but all those injecting or pumping should be trying to time it perfectly as much as possible.....

That sounds like the bolus/carb equivalent of splitting your arrow in the target with a second one in archery, aka the “Robin Hood” shot!