BUFFALO, N.Y. — The 2021-22 Flyers and leads are just like oil and water. They simply don’t mix. After scoring the first two goals of the game in the first period against the Buffalo Sabres on Saturday night at KeyBank Center, the Flyers gave up four goals in the second period and ultimately fell, 4-3. Although the Flyers didn’t win the puck possession battle in the first period and still managed to score, they weren’t able to sustain any momentum in the second period. The Flyers attempted a resurgence in the third period, outshooting the Sabres, 10-2. Additionally, the Flyers drew three minor…