Leaf Damage

I started noticing that the tips of leaves are falling off my plants. I'm pretty sure its not a pest because we always find the tips in the soil bellow the plants. Has anyone seen this before? I also included pictures of torn leaves that also just appeared. By the way the strain is Great White Shark form Green House Seeds, all the pictures are the same strain.They are in the fourth week of veg. I also included a picture of a leaf thats getting these weird blotchy-brownish patches, any idea what those might be? it's a bottom leaf so could it be caused by lack of light?

Ps. Also first post

Looks like something has been munching on it too me.......

The thing is I always find the tips in the soil. So its like they are just being cut off

I have noticed on my plants little slits in some of the leaves but no matter what I can't find any bugs on the leaves or in the air. I noticed a small gnat or 2 over the course of my grow but killed them and haven't seen any more since. Is it your whole plant or just a few leaves? It's possible you have bugs in the soil or in the air like gnats. I would keep a close watch and check the plant every hour or so to see if you notice anything moving around.

Shere looks like a bug. You know some bugs come out at night , and are hard to find.

Thanks for the feed-back, the issue only appears on a few leaves. I haven't noticed anything flying around in the tent. How would you check for bugs in the soil? also any ideas on that blotch brown-gray leaf?

I have leaves on my plants that twist and even rip sometimes. It never seems to affect health or anything.
I hate to say it but if you don't have bugs munching on it, do you have a cat?

I don't have any pets. It seems like they are just falling off from nowhere. I don't think its actually effecting the plants too much they are all still growing completely ok and it just seems like it could be the start of something worse?

IMO just a little to hot of medium and than your fans wind can tear them like that; because of brittle crispy leafs. If your in soil I'd just ride it out.

What the guy above said.