Sudden appearance of "Worker exceeded CPU time limit" errors

Previously-working workers being tested with wrangler dev --env development --remote started failing on Friday, and I can't figure out why. Our production workers appear to still be working fine, but testing workers with wrangler dev is not. The workers will respond to a few requests and then fail with X [ERROR] Error: Worker exceeded CPU time limit. errors. Once they fail with this error, they continue to fail for all requests until restarted. Bizarrely, if I pull from our main branch (which is deployed to production) and run wrangler dev, I still get these errors even though the worker is functioning just fine in production.
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