Someone correct me if I am wrong, but I don’t think the canon states onlt a “second” reception of the Eucharist. It states that a person “can recieve a second time on the same day” with full participation in the mass.
There are possibilities of being present and recieveing more than twice, such as an acolyte, deacon or priest. I serve as an acolyte and occassionally serve in more than two masses in one day, I am the only instituted acolyte in my parish. I will be, God willing, the only permanent deacon in my parish come December 11th.
Once a moth we have three Sunday masses, we add an evening youth mass, and I normally serve all three.
According to the diocesan canonist who taught us canon law, there is nothing wrong with this. It is proper if the person is participating in the entire mass. The limitations were applied years ago to correct a practice of church hopping just in time for the reception of the Eucharist. The situation I mention above is not what the canon addresses.
I believe the deacon, priest or any EMHC who crosses his arms for a “blessing” then proceeds to distribute communion whould cause more confusion and appearance of scandal than recieveing the third time.