Cotyledon Leaves Turning Yellow

Hey all..

I've just started a new batch of Lemon OG seeds, and I'm currently onto week 2 of growth.
The cotyledon leaves that were on one of my seedlings are yellowing very quickly. It's seemed to not affect any other area, should I be concerned?

Pictures please. But it is natural for those to die off so don’t worry about it.

If it starts spreading to the first set of leaves soon then you have a problem.

But young leaves often die off due to low light levels as the plant fills out.

No.