I thought the same, I was actually just too lazy to pick out that stem right away and I’d do it later. But now it really looks as if the catyledon is growing back on it.
The only possible explanation I can come up with is that she really got beheaded but did not lose the complete node and suffered a kind of microscopical fim leaving behind so little of the catyledon that I couldn’t see it.
However,I would have never thought that something like that would even work. When I 1st learned training techniques I was taught that you shouldn’t top before the 4th node, but I guess technically it can work. And I’ve actually never experimented with cutting before the 4th or fimming in general. I am curious how it’ll grow.