Analysis bug (50-move rule)?

So I just played a game against the computer. Was winning for a while, but eventually lost. At least, I thought so until I looked at the analysis.

Here's what happened: On move 61, my opponent made his last pawn move which was a promotion to a queen. All other pieces and pawns were gone, so it was a queen and king v.s. king end game. Apparently the 1700 rated bot doesn't know how to checkmate with a king and queen (which is odd by itself), but he eventually mated me on move 111.

That's right, he mated me exactly 50 moves after his last pawn move. Quite the coincidence. So the game correctly (or at least, I think) shows I've lost. But afterwards I went to the analysis, and it shows the game as a draw. As the checkmate was exactly 50 moves after the last pawn move, I assume the analysis thought it was a draw by the 50-move rule.

So, this is a bug right? The analysis should show this as a win for the computer as well. Am I missing something?

Edit: just to show what it looks like I've added an image. It's inconsistent as well, as the bar correctly shows black won. 

When I save the analysis and later go back to it, it doesn't show a draw anywhere. Seems to only happen the first time?

Oh, and as this is the analysis forum: feel free to comment about the game itself.

Your understanding of the 50-move rule looks correct to me. Getting checkmated on move #111 should count as a loss, not a draw.