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Could you describe your cluster environment more or provide the support bundle? Is there any abnormal log in

longhorn-manager

related to

longhorn-instance-manager

?

we've found the problem it was

PriorityClass

that was added a month ago. For some reason it only started impacting us now and unlike in the article it was not happening every hour but randomly, once the

PriorityClass

was added in Longhorn all started working properly again https://longhorn.io/kb/troubleshooting-instance-manager-pods-are-restarted-every-hour/