401 unauthorized errors all of a sudden, intermittently, then resolving by themselves

I’m getting a 401 unauthorized error when posting a webinar registrant, but only sometimes.

here are some recent x-zm-trackingids

v=2.0;clid=us06;rid=WEB_7cb28041f68bbd00c19e0ef7eaf4a39e

v=2.0;clid=us06;rid=WEB_9df403c1409761e55a7fe627d57c9304

v=2.0;clid=us06;rid=WEB_64a740f6694effc7d42f972df4a94477

v=2.0;clid=us06;rid=WEB_506058806458eda832f6df13bce0c22d

there is no error code, no rate limit, no message about invalid token or any other additional information or context.

I’m trying to troubleshoot intermittent and inconsistent errors with Zoom API, and this post is related to the other 2 I’ve put up recently (linked below).