Those sound like wireless outlet DIMMERS. Wireless outlet switches would shut off completely, just fine.
The LED bulbs you had in there were not meeting the minimum load rating on them. These dimmers still pass a small amount of current, even when off. Being under the minimum load means the bulbs are still trying to activate with the trickle current, but there's not enough current to fully turn on.
Bulbs that pull a heavier load to meet the minimum load req., as stated above, will help. The LED bulbs MUST also be dimmable, or you risk damage.