I can help make one thing make sense. That is his "placement" of Reva on the bed. This is part of why I do believe his story.
I'm hearing impaired so I pay attention to how people hear things and he may well have "thought' he heard her by the bed and so in his mind he basically creates the scene. This is especially true if he's telling the truth and the room was black.
He hears noise and the darkness and the confusion makes him "place her on the bed." He was probably whispering to her the whole time without even realizing it as he made his way to the bathroom.
Some of the way people repeat the details in this case are very annoying. If I'm not mistaken he didn't say he heard the toilet flushing. Yet many people are haranguing that fact as if it's carved in stone.
Think, if he had heard the toilet flush he would have thought it was Reva, he didn't, he heard strange noises coming from the bathroom not the toilet stall.
He gets up and goes into the bathroom and sees the window open and thinks the robber has climbed in the window and that "by chance" he had woken up and caught him and now the burglar is hiding in the toilet stall.
If you think about the way things went down, waking suddenly in the middle of the night, as if something is wrong, then following through on that feeling and manifesting the entire scenario in his mind.
This could well have happened.
What I would be curious about is if Reva had her earbuds in on her phone. When you block your hearing with these devices you are less aware of the noise you are making around you.
If she was wearing the earbuds, to me, it would account for the confusion, why she didn't answer him, and why the noises she was making seemed odd.
Normally at night people tend to be quieter out of habit, if she had hear hearing compromised she may not have realized the level of noise she was generating.