I am usually using grappling gun as transportation on early game or on the gameplay that has no squeak through
The thing is, Autobuild won't build ghosts if a weapon is on my hand, so I have to wait like 15 seconds for my character to put out its gun. I don't know if this is an intended behavior. If it is, I hope you would add a setting to allow player to build immedietely, even when they're "in combat".

Yes, it's a check if you are in combat, then no building is happening.
I also thought about ditching that check, it's mainly a thing to make it more realistic, but it's also a bit annoying.
I experienced it, when killing worms in seablock and even if worms are dead, it stops working, when I accidentally step into a remaining spit pool.
I need to check, if it has other consequences, though.
A setting is probably the way to go.

This should be fixed now with 0.5.6
I added a setting per player to enable building while in combat

Thank you so much!