Swaddling

[AlligatorsMum]

Hi

I have been swaddling our son since birth and has beenin ergo cocoon swaddle. I started transitioning him with one arm out about a week ago and he was sleeping fine during the day and still sleeping through out the night.

My problem is in the last few days he has been waking and unable to settle himself during the day. he woke just before but was obviously still tired and I popped his arms back in the swaddle to see if that helped and he was asleep within two minutes (after crying for about 10mins once he woke up)

He is still sleeping perfectly fine during the night with one arm out so I can't figure out what the problem is?

Any ideas??