Maybe due to the dubbing issues. Nick PL used to air some random eps from S1-3, but later continued from S7. In the meantime, Master Film created the dub for the missing episodes from Seasons 1-5. You can see the difference by their type of VA, who theoretically could be heard in the further episodes.I always wondered, why does the CEE airs TONS of spongebon season 6-8 episodes?
Edit 18:32, 13.01.2020 - no new episodes of The Loud House on Nicktoons HD CEE.