Is it true that using the automatic swinging yao lan (sarong) can cause damage to the baby brain due to constant swinging motion?

I don't think it will cause damage to the baby's brain, but according to the physiotherapist in the neonatal ward, it's best not to put them in yao lan because it is not good for their spine. also if baby doesn't know how to turn his head yet and has a chin to chest position, he might choke on his spit up, causing death. there are such cases in news articles.