Odd 850 turbo leak

I have an odd oil leak on my 94 850 turbo wagon. When it’s filled up the correct amount it slowly leaks until some point and then it stops leaking (below where it should be but far from empty). I have mostly just been complacent and just topping it up every couple of weeks, but I have been thinking about trying to deal with it before the snow comes, just not looking forward to troubleshooting this issue lol. Already tried a couple of things that didn’t work. It’s probably a long shot but maybe this is something someone has come across before?