The 32-year-old comedian joined presenter Steph McGovern in the studio yesterday (1 July) to discuss the benefits of exercising to help combat a sleepless night.
Earlier in the programme, Lycett revealed he had stopped using single-use plastic in his home in an attempt to be more environmentally friendly.
#joelycett #stephspackedlunch #gmb Joe Lycett walks off the day time show after saying earlier he has banned all white plastic from his house, and Steph spots one on the photo pic.twitter.com/GUj5s3yRjq- Andy Barnett (@AndyBarnett787) July 1, 2021
However, things took a bit of an awkward turn in a later segment, where the guests were talking about Love Island garden décor.
McGovern said to Lycett: "You're well into this, aren't you Joe, because you've pimped up your garden and made it look more Love Island? Shall we have a look?"
We then saw a photo of Lycett sitting in his garden in a deck chair, as he said: "I don't have a fire pit so I just got a candle."
Gardening expert Siobhan offered up her critique, saying: "Yeah, you could do with a bit more colour in there, you've got a bit of colour on the deck chair."
But the conversation went south when McGovern noticed a plastic bottle on the floor beside him in the snap.
With a smirk, McGovern asked: "Isn't that one of the bottles you said you'd stopped using, in that picture?"
The camera cut to Lycett, who did not say anything for a while, saying after a long pause: "I didn't realise I was on Newsnight..."
People in the studio laughed at his comment, while McGovern continued to explain what was coming up in the rest of the episode.
However, as the camera panned to Lycett, we could see him walking off stage as he removed his microphone.
After a break, McGovern told viewers: "Joe Lycett was going to stick with us but he's had to leave."
While Lycett has not addressed what happened on social media, many other viewers were quick to comment online.
One tweeted: "Did you just storm off in huff? Steph's Packed Lunch????"
Someone else asked: "What happened to Joe Lycett today on Steph's Packed Lunch?"
A third said: "Walked out like a spoilt child over a light hearted comment over a plastic bottle."
This hasn't aged well #stephspackedlunch https://t.co/XoNgF93i6g
- Ⓢⓘ:m:ⓞⓝ :flag_white:️:rainbow: (@Simon_Lee1980) July 1, 2021
Others questioned if the awkward exchange had been some sort of stunt, with one commenting: "Is it a wind up? Is it for a thing? there didn't appear to be [a] massive gap in the rest of the programme...."
Another added: "I still can't work out if Joe Lycett was jokingly walking off camera or if he didn't realise he was in shot...surely that wasn't a genuine strop?"
One other person said: "Wind up, deffo. Do you really think he would've mentioned white plastic & provided a pic with white plastic in it? I've read his book, he thinks about his wind ups."
LADbible has contacted Channel 4 for comment.