As an additional note, shutting down and then resuming the multiplayer mission seems to "fix" the issue, but creates an entirely different issue. After shutting down the mission and then resuming the mission; disassembling, then assembling at a new location //will then// create a new marker/respawn. **However**, the old marker/respawn still does not go away, which then means you now have **two** respawn locations when there should **only be the new one**.
UPDATE: I may have some information that can help with fixing this issue. It seems that when you disassemble the Sleeping Bag/Tent, the Bag/Tent entity still remains on the ground despite being disassembled and equipped.