Rare occurrence. 10 minutes with no GK, no difference at all.

[KenoticFC]

So the nerve wrecking last minutes of this game had something rare happen, a GK getting injured and the crazy part is the opponent did not sub him out (he still had 2 subs but maybe he gave up and left or something). My question is what happens in these cases , the match didn't change at all, can you imagine in real life playing against a team with no GK?

My lucky guess is 1.sub bug, he clicked the button, but the command was delayed.
or 2. I'm not sure about this one but does an injured player leave the field every time, I may have read in a rare occasion the assistant mentioning the players name like being on the field when subbed out.