ok, np if you don't support 1.87 yet. Just fyi:
It woks up to "Random-Medium-Large" Maps without issue. I don't play competitive but rather role play. So I let the AI spread, which results in large battles. I'm also sometimes using my own "Minimod", which gives the AI more income and larger fleets. No issues.
The problems start with "Random-Large" or bigger Maps. Here the game crashes quite reliable 30 minutes to 2 hours into the game (with or without my own mod). Curiously sometimes before large fleets are build. I could mitigate some crashes by reducing effect detail level. But still couldn't play through a game on a "Random Large" map.
I just had a small Map crash. It seams to be the Galactic Empire who crashes the game (at least 1.87). I started a large Map with all other races than Galactic Empire and it worked so far.
I can tell now that I'm absolute surely have no clue. Did some games with Empire without issues.
The dark force is good on hiding.