This is a known issue that is acknowledged in another thread. I'm sure it will get fixed fairly soon. By the way, you have a GE Fan Smart switch, not a GE Dimmer Fan Smart switch. 
The thread is 2.2.3.118 - GE Smart Fan Control and Alexa but the salient comment is a quote from
Alexa Skill - support for window shades/blinds - #17 by bcopeland
