not "following month of approval" per se.

if your approval is on 25 Jan, statement in the letter is 4 Feb, your first cb is actually on 4 March (first actual statement).

there will be no statement for 4 Feb due to incomplete statement month (25 Jan to 4 Feb). system will only gen the statement on 4 Mar instead, that's where you cb is credited (for transactions posted between 25 Jan to 4 Mar).

yeah, I encountered it.

one supp statement was out in <1 month cycle (immediately follow principal). another supp statement >1.5 month cycle later.

luckily didn't die die spend immediately. I just wait for it.