Update, this is the final resolution from Microsoft: Hope this is helpful...

Please see the below resolution:

Error

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Step 1 (Execute SSIS Package): Unable to start execution of step 1 (reason: Error authenticating...

We were able to capture the error in a HUGE log that we had running to attempt to catch this random issue. We shipped that off to Microsoft support, they...

Any updates on this?

TangoVictor, Any updates on this?

Thanks for keeping us posted, please let us know how things go over the next few days/weeks. Crossing our fingers - would be great if this is just a patch...

TangoVictor - we have an open case with Microsoft but have not gotten anywhere so far. We are on SQL 2019 cu 11 and the same windows server install as...

I am experiencing similar issues, please keep this thread posted. Curious if the most recent CU helped.