Guide Sluggish with Xi6-T

I have the Wireless Xi6-T box which seems better than the Hard Drive box (XG1v4) but notice when scrolling the main Guide up and down it very slow and sometimes unresponsive almost like it can get stuck or freeze. Also using the Wired Ethernet connection and have unpaired and repaired XR15 remote. Is this normal with this box. Also, I have 1 Gig speed plan internet and signal is strong.