Are you eating more protein in meals with few carbs?
Many find they need to protein count when eating low carb.
There’s a scientific word for what happens but basically, without carbs, our body breaks down protein to glucose so we have to dose for the protein. Like carbs, the insulin to protein ratios vary person to person but I believe for most a good starting point is half as much insulin for protein as you would for carbs.
You may also want to look at doing a basal test to check your basal dose is correct if you are finding you need to correct more often.
It is not unheard of for our basal needs to change over time.