It's fairly common and discussed in the white paper. Absolutely nothing "unhealthy" to worry about
Two pools racing with two blocks on each side. That's not entirely healthy.
https://twitter.com/BitMEXResearch/status/1655339317835726848
Discussion
Two block reorgs are pretty rare. Last time was in 2020. Both blocks s both sides being from the same pool could suggesy a relay problem or a selfish mining attack. Not world ending, but worth investigating.