Hi,
So a plan to deal with this is in the progress, there's something I need you to do so we can progress further.

If you won't mind, please, go through these steps

Switch to latest Arma 3 "profiling branch" - Steam Branches
Go into "Arma 3" directory in Steam and rename "arma3profiling.exe" to "arma3.exe" (Launcher and BattlEye are expecting that one).
Launch game and start playing until you will have these fps drops.
Press together {L SHIFT} + {NUM -} (NUM Minus) and release them - Help
Then just type "frame" (as with any other cheat mentioned in the Help)
Should a dialogue stating it was successful appear, select "COPY ALL" (third button at the bottom row).
Data should be copied to clip board so paste them (CTRL+V) anywhere you want (e.g. create a new txt file on desktop and paste the info there)
Once you have that file, please upload it here with rpt file from this session (or, if you encounter any trouble with that, to some free file sharing service and post the link here).

Thank you very much :)

I have ran into a problem and could not locate "arma3profiling.exe" in my Arma 3 directory.