Keycloak connection being dropped

[fvde]

We are seeing pretty weird behaviour, where the flask service fails to get an answer from Keycloak every now and then. It works most of the time, until it doesn't.

02-06-2024 10:03:08 AM ERROR:oic.oauth2.base:http_request failed: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response')), url: https://our.domain.com/realms/master/protocol/openid-connect/token/introspect, htargs: {'allow_redirects': False, 'cert': None, 'verify': True, 'timeout': 5.0, 'data': 'token=<redacted_token>&token_type_hint=access_token', 'headers': {'Authorization': 'Basic <redacted_auth_header>', 'Content-Type': 'application/x-www-form-urlencoded'}}, method: POST

Possibly related issue:
The following issue seems to indicate, that Keycloak drops unused connections after 60 seconds. We see the above behaviour increasingly after periods of inactivity, so it fits our pattern.
marcospereirampj/python-keycloak#36

Versions:
keycloak 23.0.5

flask==2.3.3
Flask-pyoidc==3.14.2