Yes, this is a bounce from the low numbers of yesterday. Bouncing will reduce and stop with time as their body gets used to lower numbers. Some cats stop bouncing faster. Others take longer.
Try and reduce sharp drops in blood sugar by feeding every hour or two in the first 4 hours of the cycle.
What you can do is to give her less food with the insulin so that she is hungry enough later in the cycle to eat. Just a teaspoon of food after every hour or after every test is enough.