Either help the OP, or stay on topic (telling us how it runs and hkw you play the game isnt on topic). At this point your input is distracting and not helpful to the OP. In the time you took to post in this thread, you could have actual answered the OP's question.
I digress...
this thread has two parts.. helping the OP is easy.. dont use the silly "insane" setting it serves no valid purpose.. use a more sensible one.. problem solved..
the other part to the thread (pushed by you) and i dont suggest any fault at all in you doing this.. is the technical "why".. so far no valid answer to that has been arrived at..
i have run a few of my own tests and helpful or not i cant reproduce the problem..
my own conclusion is that when names like.. "high".. "very high" and "insane" get used for any setting there is reason for that.. the word "insane" does carry certain connotations.. he he
even with my relatively high end hardware i would not be surprised if such a named setting caused problems.. nether should the OP be.. for me that would be the end of the story.. i would not pose the problem to a forum and expect to get an explanation..
what does puzzle me a bit is why some folks expect (take it for granted) to be able to use "insane" settings and not have problems..
my machine plays games quite nicley.. but it has its limitations.. i could soon create a scenario where it dosnt.. a simple move up from 1440 to 4K would f-ck it up completely..
also a 1080 card is high end but it aint at the top.. i see no problems for the odd game having a setting that is beyond its capabilities.. more so when they get called "insane".. he he..
trog
ps.. i am now at the final boss battle of Titanfall 2.. its an impressive game.. i would suggest all the critics.. unless they have actually played the game.. shut the f-ck up cos they havnt a clue as to what they are talking about..