Six month old waking up hysterical from naps

[IsThisYourSanderling]

I don't know what's going on. He's a happy baby when he's awake, and sleeps well enough at night. He's developed this thing where he often wales from daytime naps and just ROARS, as if he can't handle the transition. It happens no matter how he's napped - in the sling, on me, or next to me - but usually after longer naps, not catnaps. It's really distressing as he's completely beside himself, struggling to catch his breath, seems terrified, and takes ages to calm down. He never cries like this when properly awake.

Anyone have any clue what's up, and how I can help him?

Separation anxiety! My baby sometimes does this too. My son freaks out until I calm him down and say mommy is here, kiss his tears away and hold him. https://www.babycenter.com/404why-is-my-baby-suddenly-waking-up-hysterical-at-nightt_1292617.bc

Hate to say it but my 4 yr old still does this..😂
Clearly she can now talk but we still can't fix it - tv sometimes distracts her. Just seems to be a waking up thing - not nice to watch though

Is the situation he finds himself in when he wakes different to when he goes to sleep? For example, do you cuddle to sleep and then put him down? This might explain his distress when he wakes.