https://forum.wordreference.com/thr...-v-ing.3221809/

#3則回應跟樓主問題相同
有人的回應是:


It's not wrong. There are circumstances in which you can use seem + verbing, and others in which you cannot. It's correct here, maybe because it's being used entirely in an adjectival way, to describe a quality.

When it's used to describe an activity -
he seems to be walking to work O

- we cannot use it:
he seems walking to work. X

I propose this distinction tentatively. I am not a grammarian.

他的想法是作形容的用法可用seem + v-ing
用作描述動作，應用seem to be + v-ing