error with chess.com awarding draw

https://www.chess.com/livechess/game?id=2335326038

White has two WHITE bishop and cannot achieve a mate, how can they be given the win when my timer is at 0

2 WHITE Bishops + King is indeed insufficient mating material,  when this material 1st occured after 80. Bxf1 it should've been declared a draw because of impossibility of mate, maybe one of you changed the draw conditions prior to starting this game?

You could've 47... Rxc7 before White premoted to a 2nd White Bishop & had plenty of opportunities to take 1 of the White Bishops before your opponent was forced to take your Rook to get out of mate, mind you White's Bishops also had plenty of chances to take your Rook.

They are of the same colour so the can't fair point it is a mistake

What a game!

I'd love to see Chess.com's response to this one! 

The site just looks at material, not locations of that material. Since it only looks at material, 2 bishops are sufficient

I'm sure that is an extremely rare occurrence and probably isn't something they would code a check for.

Currently you are right, we don't code check for two bishops of the same color... but we have a ticket in now to start code checking for it  

You should feel special, to have a game end that way is probably 1 in 1,000,000,000 games.