Best answer as chosen by user JGO_Sandwich: Yes.
That issue comes up weekly in the CNET Samsung forum (or monthly.) A signal booster reduces speed so I won't discuss that. I'll leave with 2 links on what to try later.
For now I can't offer much as I have no detail of the WiFi router and settings, distance (these are good at about 20 feet) so let's check one last thing. Is the player's firmware current? (ask Samsung)
Here's a few links.