https://support.chess.com/en/articles/8566476-how-do-ratings-work-on-chess-com
No, It doesn't take into account rating from other time format. It is because you haven't played any rapid time control in a while. After some games it will return back to the usual + or - 6 to 11 points depending on your opponent rating.
I took a multi month break from rapid and played mostly 5 minute blitz for a while, and got my blitz rating up to a bit higher than my rapid rating (maybe 1140 blitz vs. 1000 rapid). This week I played 2 rapid games after and was matched against players about my rating - the first one the system gave me +17/-19 I think and the second was +18/-18 for the win/loss as opposed to the usual (approximate) +-8 per game. Does the system take into account ratings in other time formats when allocating points to get you to your "proper" level sooner?