Seems to be a similar issue to what I've just reported:
https://answers.ea.com/t5/Mass-Effect-Legendary-Edition/Game-crashes-when-selecting-teammate-powers/m-p/10359509#M4633
I've included videos there, Can you check if it is the same issue?
Playing on insanity is super hard with this bug because you have to replay the same battle several times not only because you die but because the game crashes way too often and forces you to re-do all the stuff again and again.
Never had this issue with the original ME2 so I assume it is a bug on this edition.
@christian_39I'm not sure if we have the exact same issue. However, after hearing what @AlistairAB said about ammo powers, I stopped using ammo powers. I also now try to avoid clicking the top quickbar to select my own powers (I only use the number keys), and I have avoided binding further squad powers to the quickbar. I click to select my squadmates' powers from the bottom bar. After doing those things, I have now gone several hours without a crash, but that could just be a coincidence. (I'm not sure which thing fixed it since I tried multiple fixes at once.)
At one point yesterday, I did accidentally click one of my quickbar powers at the top, and it removed it from the quickbar even though I didn't want it to get removed. I tried to drag it back up to the bar but it ended up dragging one of my squadmate's powers up there instead. This sounds similar to "Option 3" on your thread. However, the game did not end up crashing after that. (It could have eventually led to a crash later, but I saved and quit the game a few minutes after that happened.)
