Updated my first post. I've noticed this as well. Hopefully the memory leak is solved in the coming weeks (or days)!
Fighting, trading, went into town 'n bought a brewery, more fighting, went to a keep and played a board-game.
Great news that you are on it! The memory leak is still here sadly:
As problemsolver said. 8 GB ram is simply not enough right now, but once this issue is fixed you should be good with 8 GB.
Intel processors seem to have some issues running the game, if you're using one that could be why..