1. Clear the game cache (cog icon in the top right > clear up system)

2. Flush the DNS cache (open 'command prompt' on the PC and type `ipconfig /flushdns` and hit enter)

3. Reboot the PC (to be extra sure, reboot the modem / router too)

Could be player transforms though, if you have more new players with flashy transforms. In that case, may simply need to turn view of other players off (eye icon at top right by teams icon)