multiplayer desync invisable players invisable blocks dissapearing blocks

I have been noticing a lot of issues seem to be creeping around for the last couple of days concerning multiplayer.

I was playing multiplayer and player 3 could not see me at all until I log out. player 2 could see me just fine and when I was moving around and such.

my multiplayer set has a 2nd pc and monitor right beside mine and I noticed player 2 was in a tunnel in an asteroid but on my screen I was in the base top side and player 2 was right in front of me. not moving at all so I figured I may be laggin but no player 3 sees player 2 and player 1 moving around just fine so that rules out lag between player 1 and player 2.. player 3 could also see player 2 in the tunnel in the asteroid.

next comes to projections. there are some blocks of the projection player 2 sees and player 1 cant fully interact with. when player 1 attempts to weld this part it simply disappears into thin air. when player 2 attempts to weld it works perfectly and the block reappears out of thin air on player 1's screen.

upon relogging out both issues are fixed but only for a random amount of time problem there is no way of actually knowing when player 1 is glitched or when your not unless player 2 is following you everywhere you go watching every move.

Another instance we noticed is when I was flying a ship my ship completely froze in place but player 2 and player 3 could see me maneuvering the ship just fine but the ships physical placement was not updating on my screen. Player 3 told me to slow down as I about rammed straight into the base as I could not see the updates on my screen. I hit the inertial dampeners and came to an invisible stop jumped out my ship and then it updated my screen. problem with the scenario is why can player 2 and 3 see me moving and able to still control the ship if this could have been a lag issue. in one instance over a period of 4 minutes or so they had to talk me though docking the ship when it had appeared frozen in place on my screen. and following their instruction docked the ship and only when I jumped out it updated. my sceen that the ship had docked from a frozen stance point.