GE dimmer switch works part time

I started to have a problem with just one of my GE dimmer switch when I use it manually it won’t turn on of off but if I try turn the light on with it the light might come in 30 seconds later. And the same with turning it off. Sometimes it won’t work at all. It acts the same with the ST app or Alexa. Worked for 2+ years then started this a few weeks ago. Tried new bulb and even tried a new switch but still same thing happens any ideas would be appreciated