Color change

It's a potassium deficiency. Hour plant is flowering and calling for a lot of potassium and phosphorus. Npk ratio is 1-2-3 for flowering so light nitrogen.

Looks good lower the PH to 6.5 also you are a late flower so I would say lower the humidity to 40% if you can enjoy 😉

Keep doing what you're doing and come back with an updated question if it stays a problem. Looking at this last week it has already had major improvements so give it time because changing too many factors at once can lead to worse problems and it will be even harder to spot. Good luck with the rest of your grow. Currently growing a sherbet myself and I hope it comes as beautiful as yours

Looks like the PH change caused a deficiency maybe from lockout. It almost looks like it wants some more sulphur to me. Look into your feeding regime and confirm its hitting all the macros and micros it needs. NPK-CaSMg-FeMoZnB exct. If they are all ok, then look into our PH and EC of the medium if you can, Your goring in soil so its not the easiest some times. Nice looking alperia ph tester! I also see your using gaia green, this need a small Mg boost from what I found when using it. Don't over water and mix the gaia green into the topsoil so it can get broken down. Good Luck!

Yea you are totally right, the phenotype is just a response to the high pH and possibly the change in pH as you try to adjust. If you havent already, I would transplant and let it sit new in dry soil for a week until the plant returns to normal, it might already have enough water not to need any more for a second.