This is interesting and sort of concerning. Article snippet comes from the incomparable Jayson Stark of The Athletic (Which is must read site regardless of sport):
• Finally, this was a year in which the Twins had the best September record in their league (16-8) — and still got swept. If you don’t count teams that lost in the one-game wild-card game format, they’re only the fourth team in the 21st century to have the best record in their league from Sept. 1 on and still get swept in their first-round series. See if you notice a theme here.
2020 TWINS (16-8) — Swept by Astros (WCS)
2016 RED SOX (19-10) — Swept by Indians (ALDS)
2010 TWINS (18-12) — Swept by Yankees (ALDS)
2009 TWINS (21-12) — Swept by Yankees (ALDS)
Small sample size (21 years) but very stark facts.