I don't know which of these fixes made this, but now Factorio runs much more smooth. Now I see what is pure 60 fps.
Linux, old ati/amd hd5770 gpu with opensource driver (radeon + mesa).
Thank you, dev team. <3

Bug appears when switching between characters and one of them hold something in hands Steps to reproduce: -two players join to server -one of them take any item in hand -swap their characters with "/swap-players Player1 Player2" -when player remove item from hands (e.g. with Q button) &quo...