T1 for over 40 years and a few months ago had a similar issue. I had excessive bloating after eating a meal, hours later I couldn’t digest food and ended up being sick and then spent most of the night trying raise my BG (all the dextrose in the world couldn’t raise my BG). The same symptoms occurred thereafter for several days.
I also eat a relatively low carb diet (100g max per day). My Hba1c has been ~34 for years, so deduced that maybe gastroparesis starting due to longevity of having T1. Visited GP who suggested it was likely just gastritis and prescribed a months worth of esomeprazole and Acidex Advance. In fairness, this did help settle the bloating and improve the condition, so maybe something to try? On the flip side, I have noticed it reoccurring again this week, so probably will try the same approach to reduce inflammation.