Slow Speed on Deco M9 Plus

Hi,

My Deco M9 (all configured as AP connected with Cat6 cables to router) have slow download speed but high upload. Anyone knows why?

The connection is 1000/1000 fiber, and my pc also shows that connected to the same router as the M9’s.

M9 is stuck on 500/1000 tho. Is that a limit or something off?

Deco software up to date.

Thanks!