Imagine. TFP but there was an ancient spirit/deity living in the Star Sabre.
Bee, after the fight at the Omega Lock, can't remember anything that happened after picking up the Star Sabre for the first time. His memories only set back in once he pulls Optimus back up onto the platform.
None of the Autobots discuss it either. The only thing they told him is that he killed Megatron. But they refuse to elaborate beyond "you grabbed the star sabre, jumped down, stabbed Megatron & saved Optimus".
Bee himself is not even aware of the hole in his memories at first. But then Raf starts asking questions about the fight and Bee always answers with the same sentence. "You know... it was a real doozie, but I got... lucky, I guess."
The first time Ratchet hears Bee say that, he flinches violently and then pretends like that is absolutely normal behaviour. No, you did not just see him crunch his incredibly fragile medical equipment. It's always looked like this.
Optimus also starts acting odd towards Bee. He can't quite look him in the eye but keeps observing him from a distance. They've also stopped their philosophical discussions (yes; I'm going to insert my headcanon that Optimus and Bee watch ATLA together and then use it as a jumping off point to discuss Cybertronian philosophy and culture into everything).
None of the bots would admit it, but all of them are doing their best to keep Bee confined to the base. He is barely out on patrol anymore. It gets even worse once they are back on Cybertron because now he doesn't even get out to pick up Raf anymore. He's always kept busy indoors. Not even Smokescreen wants to sneak out with him.
Still, no one wants to answer his questions about what happened at the OmegaLock. He tries to corner Smokescreen and Bulkhead about it because they are the weakest link when it comes to resisting Bee, his shenanigans and questions, but neither of them budge.
And then Bee starts noticing other signs of change. Sometimes, his optics will suddenly just burn brighter. Bright enough to illuminate dark rooms or reflect on metal surfaces around him. Sometimes he is no longer sure that they're really blue.
Then, one night, he has a dream. He is lying somewhere, prone on his belly, unable to move and incredibly tired. It's hard to comprehend anything that's going on. His surroundings are bathed in blue (?) light and he can't see him, but he can feel Optimus being there, incredibly tense as he stands in between Bee and something that's so old it should have dissolved into dust eons ago. Optimus and the thing are talking but he can only gauge snippets of their conversations before something soothes him back into deep recharge. Last thing he hears is Optimus' yelling his name.
Then he wakes up at the entrance of their base, Optimus and Ratchet waiting for him as he returns from a drive. He has no clue where he went. Or why they look at him as if he was a ghost. Until he checks his internal chronometer and realises that the equivalent of a week has passed.
And when he asks what's going on, Optimus just pulls him into a hug and holds him for a long time, not saying anything.
