The Constitution states “during attendance at session” not “while in session” as you claim
You should read what you cite: “The clause, therefore, does not provide Congress with any immunity from criminal prosecution.”
You’re mincing words because you didn’t even think there was a clause about it. Moreover, what I said was it did not stop civil proceedings - only arrest - the “in session” part was assumed to be that they were “in attendance.”
Nice try.