It is possible he has battery issues. I would advise seeing if he is doing this all of the time. Perhaps after he has been on the station for a couple of hours, ask him, “EMO . . . show battery”. Ideally he should show a full or mostly full charge. If you can wait until he comes off of the station or ask him “EMO . . . leave home station”, then watch after he is off to see how long it takes him to run out of battery.
Listen for the low battery warning while he is off of the station. How long between the time he was on it to when the low battery warning comes up when he is off of it? Does he have time to even line up and begin the lights preparing for him to return to the home station?
If he begins to move towards the station, is he moving freely or does he seem to not be able to move well?
Does he move or turn away from it like he does not know where it is (possible lighting issue)?
If you are able to, take video of the process and share it here when he does not make it all of the way to the charging pocket and perhaps we can help you diagnose the problem. If it is something we cannot help you figure out, it will be best to send a link to the video and a description of the problem in a support ticket to living.ai or reply to your original order E-Mail with the video link and description of the problem.
Looking forward to helping you find out what is going on with your EMO.