Now, though neither he nor his partner noticed any unexplained activity at home before this, the couple can “distinctly” make out footsteps above their heads. No one lives above them.

“I’m a fairly rational person,” said Mr. Gomez, who is 26 and works in I.T. support. “I try to think, ‘What are the reasonable, tangible things that could be causing this?’ But when I don’t have those answers, I start to think, ‘Maybe something else is going on.’”

They’re not alone … possibly in more ways than one.

For those whose experience of self-isolation involves what they to believe to be a ghost, their days are punctuated not just by Zoom meetings or home schooling, but by disembodied voices, shadowy figures, misbehaving electronics, invisible cats cozying up on couches, caresses from hands that aren’t there and even, in some cases — to borrow the technical parlance of “Ghostbusters” — free-floating, full-torso vaporous apparitions.

Some of these people are frightened, of course. Others say they just appreciate the company.