The follower pointed out that he "couldn't see any social distancing" int he photo of the 37-year-old.
"I’m a horrible, irresponsible person, thanks for pointing out," Tim responded to the accusatory comment.
What the fan doesn't know is that Michael and Leah are Tim's Melbourne housemates.
The three of them share a place along with one other housemate, and their two pet dogs.
Leah seemed to clear up the mess with her comment: "Yay! Housemates pump sesh!"
Tim lives in Melbourne as he films Neighbours there, but he frequently flies back to Sydney to visit his wife Anna Heinrich.
Earlier this month they posted a photo together on a walk around Watsons Bay, in an attempt to "keep sane" during this global pandemic.
"Getting some gammas and steps in together," he captioned the post, with his arm around his wife.
"Fresh air, sunshine and exercise keep me sane hope you guys are finding a balance with your social distancing."
It comes after the couple faced with split rumours in November 2019, when Tim was spotted not wearing his wedding ring at the Melbourne Cup.
As for his lack of wedding ring, he wrote on Instagram earlier that year: "I was never really a ring kind of guy" and added that he only wears it on "special occasions".
Tim and Anna got married in Italy in June 2018.