The people who were burning out at home would become revived and re-energized when they came into the office for something and would stay that way for a week or two.
Then they would slide back into burnout and social problems (assuming benign interactions were hostile in Slack or that people were backstabbing the. was common) the longer they were away from the office.
Some people had the self-awareness to start bringing themselves back to the office for a few days each week and would directly admit they struggled to work from home.
It’s really not uncommon and readily acknowledged in every offline remote work environment I’ve been in. It’s only on social media where you run into claims that remote works well for everyone.