Quick run down; ive been programming some systems lately and recently decided to put them all together on a baseplate, things have been working fine, until around a week or so ago when occasionally (sometimes without warning) the frame rate would drop so low and the performance would tank so high that it would near blue screen my laptop (though I used my laptop for the video as its a more low end device).
The strange parts are that the micro profiler displays mesh task processing repeatedly as the problem child, and yet no matter what mesh i delete it always comes back, nothing in the micro profiler is indicating to me that its an issue related to a script of mine, and I can trigger it easily on my low end laptop by walking up to some higher geometry track links. (Surface laptop 2, so not super low end, should be able to render a 20k tri mesh track link 
).
I was debating to make this a bug report due to the nature of the issue, but im going to first assume its something wrong with what im doing? tho for the last 7 years ive been using roblox studio ive never encountered something like this before.
to note in the video, the video itself slows to a crawl at a certain point, part of that is because of the gameplay, but notice how even the mouse frame rate has lowered, that’s because even the recording software is struggling:
ive also shown draw counts so everyone is aware of that important detail: