Jason often stays awake days at a time, only finally getting some sleep when he simply can no longer function and starts making stupid mistakes. He then crashes, in a bed if at all possible at his current location, and sleeps in one of the upper corners of the mattress curled into a tight ball on his side occupying the smallest space possible. He is however capable of sleeping anywhere, on anything, and is an extremely light sleeper. When he had first come back to Gotham after his death, he had taken things to the extreme, gotten hurt far too many times because of it, and had fallen asleep on the job more times than he would ever willingly admit, often foiling his own plans.
This issue originated long before he was Robin, before his mother's death, back when he never could be sure that one of the sleazy scumbags his mom brought home weren't going to sneak into his bedroom well after she had passed out. He had learned early on.
His sleeping habits when Bruce had taken him in perplexed both he and Alfred. Many nights those first few months, both men would find him tucked into the most random crevasses of the manor at odd awkward hours. Under desks, in closets, in dark corners of the hallway. And no matter where Jason slept, no matter how little he slept, there were always nightmares. There were many instances in which Bruce had to force him to get some rest, with much failure in the beginning. Bruce was against regular use of sleeping aids, but was for a long while unsure of how to fix the issue. Sitting in an arm chair next to Jason's bed, offering to watch over him until he fell asleep only unnerved the boy further, completely restless at having eyes boring into him as he lay in bed.
Locking him within the room was only attempted once, with much regret, as Jason had had a full scale panic attack when he had discovered he was trapped, resulting in a broken lamp, skinned knuckles, some fractured toes, and a long crack running up the bottom of the door.
One night Bruce awoke to random vibrations, only to find Jason tucked in the corner of the king sized bed against the headboard, twitching spasticly with one of his nightmares. Bruce had never heard him enter the room, never felt him climb onto the bed, and had no doubt that if Jason hadn't started having that nightmare, he would have awoken in the morning never having known the boy had even been there. With this realization, he had gently run a hand through Jason's hair, immediately stopping whatever terror going on in the boy's mind, and drifted back off to sleep with his fingers still carding through Jason's hair. Sometime in the morning he had felt Jason startle awake and flee the room. Bruce thought that would be the end of it.
Instead, afterwards it became almost a nightly occurrence.
With time, Jason stopped eventually stopped bolting in the morning.
Just before Jason's death, it had only just started becoming a regular occurrence that Bruce was waking him up in the morning. There had finally been progress.
After his death it was Bruce that could no longer sleep.
Even now Jason still has his problems.
On occasion, when he's had a particularly bad week, and he is at the final stretch of his exhaustion, he will curl up, jacket pulled tight around him atop Wayne manor's roof.
Above Bruce's room.
Because even after all this time, even with all the bad blood between them, Bruce is still…safe