Probably just let them vent until they adjust their habits and just chat with their co-workers, without the need to use this as an excuse. Then, they can enjoy the fast loading times :)
Why would the boss accept that? They automated the work to eliminate employee downtime. If the employees were upset to lose their chatting time then presumably they lack the agency to choose chatting over work duties when they’re unblocked. The only way to help them in that situation is to organize them
For most people, liking and being friends with the people you work with is a huge factor in how much you like the job and are willing to stay. Most of the times I’ve left a job it’s been triggered by the people I liked talking to leaving and the remaining team members being dull and anti social.