Game crashes upon entering the Nether

I've been playing in the same world (seed -551566413) for months without issue. But for the past few days, the game has been crashing without warning whenever I try crossing into the Nether or 1-3 seconds after first appearing there. Everything seems to work normally as long as I remain in the Overworld. I've tried three separate portals in various Overworld locations with the same result.

It's possibly unrelated, but some bees unexpectedly entered a Nether portal and remain stuck in my Nether base without a nest. I sometimes glimpse them flying around before the game crashes. The only other recent change to the game I can think of was the 1.18.30 update.