Azure DevOps intermittent connection failures (TeamCity Professional 2021.1.2 (build 92869)).

Hello,

Since Friday the 20th of august Team City sometimes has trouble connection to our Azure DevOps Git repository. This literally happened from one moment to another.

Team City version: TeamCity Professional 2021.1.2 (build 92869)
We do not use SSH.
We do not use a Proxy.

Exceptions:

Test connection failed in [REDACTED]
List remote refs failed: javax.net.ssl.SSLException: Connection reset

Or:

 Failed to collect changes, error: List remote refs failed: javax.net.ssl.SSLException: Couldn't kickstart handshaking

Or:

Test connection failed in [REDACTED]
List remote refs failed: org.eclipse.jgit.errors.TransportException: [REDACTED]: authentication not supported

On occasion the connection is made successfully resulting in a clone and build.

Credentials are in order. We re-entered them just to be sure.

Any assistance would be appreciated.

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