E12 led smart bulbs don't work in ceiling fan
This is a common problem.  It's due to some sort of "powered switch" (i.e. a switch that's more than a switch) powering itself by leaking power through the bulbs. Works great on incandescents because an unlit incandescent is nearly a dead short. For LEDs it just makes them go crazy.  

Anyway, the cure is to either a) leave one incandescent in, or b) wire in a paralleled device such as a Lutron LUT-MLC which emulates the incandescent light effect.