Platform API 401 on POST /api/v2/architect/flows during JMeter ramp-up

Is it possible to bypass the standard OAuth token refresh delay when hitting 401 Unauthorized errors on POST /api/v2/architect/flows? Running JMeter 5.6.2 from Singapore with 50 threads. Token expires mid-test and GC returns 401 instead of 429. Docs are vague on concurrent token validation.

Thanks.