Is this nute burn or something worse ? Or is this just normal

yeah you are feeding too much. I like to do this with any watering schedule. 1st watering of the week is with nutes, 2nd watering just water, 3rd watering nutes. if you water 4 times a week then do the first 2 with nutes 3rd just water and 4th nutes. This pretty much ensures you will not over feed the plants and burn them. Also a great way to prevent accidental lockout. Ive been doing this now for 2.5 decades and I have never had a lockout/over nute situation since switching to this routine

First picture shows signs of nutrient burn, pic 2 is nothing. From the very dark green colour of the leaves, it seems you may be feeding too much or too often. Also, do your plant a favour and go to 18/6, cannabis NEEDS sleep to have a completed photosynthetic cycle and a correctly functioning metabolism. Yields will be identical, if not more with a proper active/sleep schedule and sticking to a very un-natural life of continuous light WILL lead to all sorts of problems. 24/0 could only be recommended by someone who does not understand photosynthesis or how plants function. Hope this helps, Organoman.

Does kinda look like the beginnings of nute burn. Could also be chlorine/chloramine damage. Are you using tap water? Might consider an RO device, or a dechlorinator solution!

I wouldn't worry just yet looks healthy still. Looks like your last feed was a bit strong just give ph water for a few feeds