TIP:
Go to this page - https://force.milestonesys.com/support/MccKnowledgeBase
Search for “lost connection”.
This will give you some knowledgebase articles on how to troubleshoot.
If this has been tried try to ask again in the support community.
Did you find something? I did not find anything about it, I have this problem, every day there are 4 or 5 random cameras showing this, it does not resolve to disable and activate / substitute for itself, the only alternative I found for now was to move from one recording server to another.
If I understand the situation correctly you are experiencing errors and you have not developed an integration using the MIP SDK that cause this error.
If my understanding is correct this is a question suited for the Milestone Support Community.