M* recently reclassified VPMCX as large cap blend. It had been classified large cap growth even though its portfolio had been in the blend column since 2018.
Its performance looked very poor compared with its "peers": 50th percentile (2018), 84th percentile (2019), 94th percentile (2020). (Though in 2021, with value ascending, it looked great - somewhere in the top 5%).
As a result of its long term "poor" performance, it had been rated 2 or 3 stars earlier this year. But with the reclassification, it's suddenly a five star fund. Nothing has changed. Its half brother
POGRX is a bit more growthy, so M* has left it in the LCG category. As a result, that fund sports a 2 star rating.
An example how even unintentional drift affects star ratings is FSMAX. It tracks the S&P 500 completion index. M* writes: "This has been one of the strongest performers in the mid-cap blend category over the trailing 10 years through July 2020." But it has been on the blend/growth boundary since at least 2017, and M* recently reclassified it as growth. So this perennially strong performer is now rated 2 stars.
I'm not faulting M* here. Funds that do not sit near the center of a style "box" have a good chance of being over- or under-rated. This will happen regardless of what box they're dropped into.