I am the Creator of a Mountaineering game, My game contains tools that you can wear once you touch them. For some reason today, They are lagging in the game, I’ve never encountered this as the backpacks have been there for over 6 months now.
What could be the reason to this? I’m puzzled.
There can be no reason if you don’t give us details.
I got some reports about there being a massive lag spike. So I entered the game and did some Investigation and found out it was the Backpacks which were causing the lag. But I tried Shutting down the server once and It didn’t work the first time, but It seems to be resolved when I shutdown the server the second time. 
Please add some more Information, so that we can understand and help you.