Young leaf deficiencies are always micronutrients. If they have enough of the major nutrients, it is unlikely in soil that you are missing any micronutrients. This leaves us with either a PH issue, watering, or something is leaching into your water or root zone blocking absorption of other elements.
If you double check your watering schedule and take cues from the plant, not a chart. Then double check your PH and make sure that for soil you are in the right range. If both of those do not fix it then you have a different cause.
I recently had a similar issue but in hydro.
I spent nearly a year trying to figure it out while it just got worse each cycle no matter what I did. During veg they would get yellow tips but once they got larger this went away. This time though they just stopped growing and so it reached crisis point.
I figured out copper was leaching from brass fittings into my nute solution and blocking absorption or either iron or sulphur. So I replaced them with new ones.
Now, two days later, they are showing signs of recovery with green shoots.
So if changing your watering schedule does not work, and your PH is right, and they are recently repotted so they have the nutrients there, but they still show a def, then check for contamination from metals leaching into your water somehow. Possibly a storage tank, old pipe fittings, or a pump. Anything metal and not new that could touch your water. It's not impossible that it could be your water pipes.