the horse i ride wont stop bolting and running out of jumps!!

Hey!! Im new to this forum but I really need help..
Anyway the horse I ride is a 6 year old stock horse, he had never jumped before I started riding him, he has now been jumping for about 9 months. We are currently jumping 95cm and he is clearing it with ease. Lately he has started running out of jumps, bolting straight after the jump and just refusing to stop or turn. It is at the stage where he is so strong that I just have to hold on and hope for the best.
Im starting to worry that maybe I am doing something wrong, my riding instructor says im doing everything perfectly and its probably just a stage he is going through though.
Has anyone got any advice or tips that might be able to help me?
Thank you!! :)

I can't say this for certain as I don't know your ability's or the horse but I would say its flaws in his training/he needs more training. I would get a new instructor if she sis letting you just hang on while you go over a jump. That's not right for you or the horse. IMO

If you could post some vids or pics it might help :)

I would be questioning your trainer. When a horse very suddenly develops a behavior, it is rarely without a reason. My first thought would be check your tack fit and check him for pain of any sort. If jumping is causing him pain because he's injured or his tack doesn't fit, it could very well cause him to run out of jumps.

I have checked all his tack and its all fine and fits well, he isnt my horse though and iv been told his owners have started to jump him lately and now he's going downhill... but its not my place to tell them, I think im going to talk to my instructor and the owners and see if they will let me restart his training. Oh and I didnt mean that I was hanging on over the jump I meant that I was hanging ob while he bolted :)

Any chance you're sitting down a tad early after the jump? Are you wearing spurs and unintentionally popping him with your legs? Is the saddle fit good? I rode one mare who's saddle would slide up over her shoulders over a fence and she would crow hop as a result. Just throwing stuff at the wall. Sure doesn't sound like a fun phase to have to ride out.

As others have said, we haven't seen you jump so we can't see exactly what is going on... but I know that in my personal experience, my pony would refuse jumps, bolt, etc, if her rider's reins were ever too tight when approaching the jump and/or they failed to give her the proper amount of release while going over the jump. Basically, if the reins were ever too tight and pulling her down onto her forehand, she didn't feel balanced enough to clear the jump without overdoing it and bolting after or just refusing.

Your instructor is endangering your safety by expecting you to keep putting this horse at jumps. Please, for your safety & the horse's wellbeing, too, REFUSE to CONTINUE this.

There IS a reason, of course, that horse is doing this, & he's telling you that something is wrong the best he can. It's up to you to go back as many steps as are needed with him to where he's DEEPLY OK INSIDE. Then he needs to be built up to taking jumps again, ALL THE WHILE BEING DEEPLY OK INSIDE.

Good luck & if your trainer doesn't start to care about you & the horse, please fire him/her.

I don't wear spurs or anything, and his saddle doesnt slip, iv had people check it but its okay. I do tend to tighten the reins now as I am scared he will bolt so I do tighten them, I have been trying to loosen up lately with the reins but he just takes advantage and bolts... I have been refusing to jump higher or when I can tell he's not in a good mood, I can tell something is wrong with him and I just don't know what, it hurts me to know that something is up with him, iv tried telling my instructor but she just tells me he's fine and to carry on, this is when I start to refusse and I just go cool him down, also the girl I ride with loves jumping high and so do I but I know she would be annoyed if I start his jumping training again and my riding instructor probably wont let me... like I said he isnt mine and his owners don't really like me very much as it is, im worried if I do try and take charge they will stop me riding him :'( so im kind of stuck thank you everyone for the advice!! It means a lot!!

I know it may not be what you want to hear but I think you may want to change barns/instructors. Clearly something is wrong with the horse be health, the situation stress, ect. If it continues he could end up getting injured and so could you. You seem to really care for him I hope it all works out.

I know, iv been considering this option for a while.. the only thing keeping me where im riding is this horse, I always get attached to the horses I ride but this horse is different, iv got a really strong bond with him and I love him so much, I hate knowing that somethings wrong with him it hurts me... I know if I move barns then im not going to be able to ever see or ride thiis horse again, and that breaks my heart </3 everyone is giving up on him but I refuse to cos I know what he is capablle of... iv just got to find a way to work through this without losing him, I don't want to seem dramatic that's not what im trying to do im just saying he's like my baby...