Earlier quoted context omitted.
It does seem that was the case and then if you can simply say "please never disappear for the whole day without telling me" and that would be the end of it. I think there's more going on here.
"Please be reachable during normal business hours" is a very reasonable demand of remote coworkers. Most of the problems I've ever had with remote coworkers was with them not being reachable and consequently blocking team progress. These people inevitably got poor performance reviews and did not move up in the company, and some got fired. When you can turn to your coworker next to you and ask a simple one minute ques…
Part of what makes corporate America suck is the kind of passive aggressive resentments that never get expressed. Suddenly the remote worker finds that everyone hates him and has no clue why.