Opponents keep blundering in this position

Last year after looking at a game of Mikhail Tal's I started playing this variation against the Caro-Kann Defense as White. It's a branch of the Advance Variation named for Tal: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4:

Although this was not the reason I started playing it, Black often blunders in the above position with 4. ... e6?? which allows White to trap the bishop with 5. g4. I've played 9 games where Black made this blunder, which loses a piece.

You'd think that being a piece up after the first few moves would result in a high percentage of wins, but it hasn't. I lost 4 out of the 9 games. Sure, they were all blitz games and I'm a fairly weak player especially in blitz, but it's not as if my opponents were grandmasters either. I'm playing against similarly-rated opponents.

Strange stuff happens in blitz and bullet games, though. The database here at Lichess says that overall White wins from this position about 68% of the time, so my 55% is not very good but it's not as far off as I would have thought. I mean, we're talking about being ahead a whole piece.

In bullet games even grandmasters can get tripped up, and they can recover. This grandmaster actually won not once, but twice in bullet games after making the same blunder just in the past few months:

It worked for him, but I imagine most people would rather take the extra piece and take their chances. Maybe you're thinking the same thing. You want to play this variation and hope that Black will make the same blunder. Be my guest. But don't say I didn't warn you.