Work conditions, strike in the sky.
RustyBertrand wrote the following post Sat, 30 Dec 2023 17:54:01 +0100
Today is the 50th anniversary of the Skylab "strike." Astronauts protested micromanagement, employer spying, & long hours. They demanded a day off, regular breaks, and greater workplace autonomy. Radios off, they floated around, enjoying space, and taking photos of Earth. NASA gave in to their demands after one day.

Edit:
"Strike or no strike, the tensions between the crew and ground control were real. A crisis meeting between the two parties was called on 30 December." -BBC