Running Steam v.0.2.117.0. Machine: Win10 Pro 64-bit, CPU: Intel 5820k, RAM: 32GB DDR4, GPU: AMD Fury X. Using keyboard + mouse.
Minerals that can be collected aren't always showing up for both players: When playing the host player could always see all the minerals, however the joined player cannot see the minerals (sometimes). The joined player would see the host player vacuuming terrain (but not minerals) however you would see the gun/backpack fill up. If the joined player vacuumed the exact same area that the host player said there were minerals, the joined player doesn't get any minerals from it, also the minerals are lost since they are not added to the joined player's backpack and the host player watched them get vacuumed up.
If collected packed minerals are dropped with the above scenario, the joined player cannot interact with the packed minerals: The joined player can see the packed minerals on the ground, when hovering mouse over the packed minerals, the UI would recognize them, but clicking and trying to move the packed minerals would do nothing, as if the game doesn't think they're really there. If the host player picks up the packed minerals, then places them in the backpack of the joined player, then the joined player can interact with the packed minerals.
When adding packed minerals/additions to platforms at the base, the joined player still sees the x-ray of what is needed: For example, if there was a blank platform that is showing an x-ray of two resins to complete the platform, then if either the host or the joined player adds something to the platform (other minerals, solar panel, etc), the platform will still show the x-ray for both resins for the joined player (not sure about host player).
Using the Trading Platform: When using the trading platform, cycling through the minerals doesn't show the correct mineral you will receive for the joined player. So if you cycle to Lithium (it states you'll get X number of Lithium), send off the trade rocket, then when it returns you actually received X number of some other mineral. Also there now seems to be a glitch of a double rocket, for example, you send off the trade rocket, hear the sound of it going to space with the minerals on it, then a moment later you will see a silent empty trade rocket go off to space.
Dropped packed minerals sometimes not loading textures: Joined player would only see the connector port of the packed mineral, everything else was not rendered for the packed mineral.
When in cavern, large section of textures not loading, able to see under world: This only happened once, however there was a large rectangular section in a cavern that didn't load for joined player. Once texture was manipulated using the vacuum gun, then the textures rendered.
Driving vehicles for joined player shows both players sitting under the vehicle: Both players were still able to drive like normal, and getting in and out of the vehicle didn't cause any problems, however when driving the truck vehicle, the joined player saw both his and the host's character sitting under the vehicle, positioned below where the seat was located.
Driving two separate vehicles and vehicle not responding: If two players are driving two different vehicles, if either one gets out of vehicle, it would cause the other player's vehicle to stop. If your character was the one to get stopped and are still in your vehicle, the only way to get your vehicle running again was to get out and get back in.
Suffocation sounds and sprinting speeds stuck (specific scenario): One player is losing oxygen, starts suffocating, second player takes full oxygen tank off their backpack and places it on suffocating player's backpack. Player stops suffocating/dying but the suffocation breathing sound as well as the limited movement stay. The sound and movement will only be reset when your primary tank is filled up by tether or gathering oxygen minerals.
I'm not sure if these were issues in previous versions but the above bugs/glitches were only seen by me after the latest patch update.
Please let me know if you have any questions.