Your smartctl data does show your drive going into standby – 141 times in the 147 hours it’s been powered on. Ovarall, that’s about the same rate as mine (roughly once per power-on-hour)
But if the drive is spinning even if it thinks it’s in standby, then my only guess is that there’s a possible firmware bug in the internal HD itself.
As to the LCCs: While an average of 4 or 5 LCC’s per power-on-hour isn’t anything to be concerned with, the folks that have higher-than-normal LCC counts seem to have either the 4TB or 3TB version. I have the 2TB version and my LCC count is about 1 per hour.
In fact, WD just released a utility to modify the firmware settings on certain internal WD RED drives:
Maybe there will be a change to the Cloud drive to modify the HD’s firmware.