What i would say to original poster (op) is do the general stuff, work on prebolusing, ratios etc. But you may find, if you are like me, it is not something that can be solved except by time. My diabetes is well controlled (99% in range, a1c 39) - my ratios are on point, my prebolusing fine...but still get it the same as op, though it has got better over time. In the mean time, if the excellent advice re ratios etc doesn't work, you may have to work around it. I had to skip dinner and thereby insulin some days so i could have time without bolus insulin on board to get active stuff done. (Don't skip meals unless you can do it safely!) I also found, at first, i could cope with a v low carb meal without insulin, prob as still producing some of my own insulin...can't do that now.
On a personal note, i also got quite frustrated with it, as it was really rather disabling as i couldn't really go further than my immediate neighbourhood for most of the day, and it did not seem to be something anyone else had experienced. I got some unhelpful, illogical, and more importantly, useless advice from my dsn about it (the same team that started me on 5 times the basal i needed, and told me abasaglar lasted 3 days - fun times), i changed clinics as a result. My new clinic suggested it would go away with time, and they were right.
Sorry to go on, but it was an aspect of my diabetes that really affected, and upset me the for the first year after diagnosis, and it wasn't nice to feel that i was on my own.
Anyway, op may not have he same as me, but if they do, that was my experience