REACHED_MAX_IAM_CONNECTIONS

[quotschmacher]

from time to time i get the following log messages

2022-10-05 11:34:22.529 - error: viessmannapi.0 (22526) https://api.viessmann.com/iot/v1/equipment/installations/$installation/gateways/$gateway/devices/$id/features
--
2022-10-05 11:34:22.526 - info: viessmannapi.0 (22526) {"viErrorId":"req-02ce61d1b46448359b93b7438f2c6407","statusCode":502,"errorType":"GATEWAY_ERROR","message":"Your request could not be performed as there was a problem with external service","extendedPayload":{"errorType":"REACHED_MAX_IAM_CONNECTIONS"}}
--
2022-10-05 11:34:22.528 - info: viessmannapi.0 (22526) Please check the connection of your gateway
2022-10-05 11:34:22.529 - error: viessmannapi.0 (22526) https://api.viessmann.com/iot/v1/equipment/installations/$installation/gateways/$gateway/devices/$id/features
2022-10-05 11:34:22.529 - error: viessmannapi.0 (22526) Error: Request failed with status code 502
2022-10-05 11:34:22.529 - error: viessmannapi.0 (22526) {"viErrorId":"req-02ce61d1b46448359b93b7438f2c6407","statusCode":502,"errorType":"GATEWAY_ERROR","message":"Your request could not be performed as there was a problem with external service","extendedPayload":{"errorType":"REACHED_MAX_IAM_CONNECTIONS"}}
2022-10-05 11:39:22.517 - info: viessmannapi.0 (22526) {"viErrorId":"req-5c7fb43792b046adbd79e8f717d05806","statusCode":502,"errorType":"GATEWAY_ERROR","message":"Your request could not be performed as there was a problem with external service","extendedPayload":{"errorType":"REACHED_MAX_IAM_CONNECTIONS"}}
2022-10-05 11:39:22.518 - info: viessmannapi.0 (22526) Please check the connection of your gateway
2022-10-05 11:39:22.518 - error: viessmannapi.0 (22526) https://api.viessmann.com/iot/v1/equipment/installations/$installation/gateways/$gateway/devices/$id/features
2022-10-05 11:39:22.518 - error: viessmannapi.0 (22526) Error: Request failed with status code 502
2022-10-05 11:39:22.519 - error: viessmannapi.0 (22526) {"viErrorId":"req-5c7fb43792b046adbd79e8f717d05806","statusCode":502,"errorType":"GATEWAY_ERROR","message":"Your request could not be performed as there was a problem with external service","extendedPayload":{"errorType":"REACHED_MAX_IAM_CONNECTIONS"}}

i am not sure how to reproduce this as it just happens (not related to my scripts as i can see on the timestamps of my own log messages).

adapter version is v2.0.9