This happened to me about three weeks ago (late October, around 5:45pm). I was on the Piccadilly Line heading south from King's Cross. Standard commute, nothing unusual.
I got on at King's Cross. Got off at Leicester Square. Journey should take about 4 minutes. I checked my watch when I boarded: 5:41pm. I checked again when I stepped onto the Leicester Square platform: 5:42pm. One minute later. But here's the thing - I have no memory of the actual journey. No sensation of movement, no stops, no other passengers boarding or leaving. Just... a gap.
My mate says I'm being daft and I probably just wasn't paying attention. But I'm usually hyper-aware of my surroundings. It felt like someone skipped a section of my consciousness. The Piccadilly Line is old - maybe there's something electromagnetic down there? Has anyone else had missing time on the Tube? Cheers.