Thank you for your feedback!
I think this tells me all I need to know.
I noticed in my settings that my library was scanned automatically + every 15 minutes. Not sure when this was set but this must be why the server is overloaded with tcp ports.
I’ve changed the policy and asked my friends/users to monitor for any reoccurrence of the issue.
I will report back with outcome of the aforementioned trial if my attempted corrective action fails.
Otherwise, I’ll close this issue as this could be a simple case of extreme settings.
I looked at this post on this and understand you mainly recommend to split the library if there is a large number of movies (I have 1236x so wouldn’t usually be considered too large). I’ll try this if my above attempt does not work.
Thanks again!