That combination is odd even after a month off. I paused for a month last October and my A1C kept falling. Maybe the stress from surgery plus the time without medication played a role, or perhaps the surgery itself created a falsely elevated reading. With your fasting glucose that low your current dose seems more than enough if anything.
I just received lab work from blood taken on Friday. Fasting glucose came back at 66 yet A1C rose to 5.9 from 5.6. I stay hungry but keep portions controlled so I do not regain weight. I am questioning whether the tirzepatide I take is still effective. How can fasting glucose sit so low while A1C climbs? I currently use roughly 6 to 8 mg weekly for maintenance. I paused it for four or five weeks around surgery because the surgeon required stopping two weeks before and several weeks after the procedures.