Frequent 502 http errors from Observatorium token-refresher

[machi1990]

We've been getting 502 http code from the token refresher more frequently.
The target observatorium instance has been up and running in all cases when this error appeared.
The token-refresher logs are:

2022/05/10 00:23:15 http: proxy error: http2: Transport: cannot retry err [http2: Transport received Server's graceful shutdown GOAWAY] after Request.Body was written; define Request.GetBody to avoid this error
2022/05/10 00:23:15 http: proxy error: http2: Transport: cannot retry err [http2: Transport received Server's graceful shutdown GOAWAY] after Request.Body was written; define Request.GetBody to avoid this error