Looking good mate!
Totally understandable to take a few days after such an event...
The issues can be photonrelated (cq Light-stress) It is often underestimated by growers and something easily mistaken for something else.
Why I think it is light-stress is that you see the issues, with yellowing, mostly on top of the plants, which are probably closest to the light.
If you had a lightmeter you would be able to check the differences.
Logic in this case thinking the biggest plant also receives the highest DLI compared to the others.
Hope this might help understanding the issue.