Red dimmer isn't working anymore

[mamber]

I have had this happen on more than one switch. Rebooting the switch by pulling the air-gap fixes it for a while. For me it takes a couple weeks to come back. I reported it in this thread…

Red Series Dimmer stops controlling load but otherwise "appears" functional

Unfortunately, you are the 3rd (maybe 4th) person to report this in addition to me in the past few weeks. Same setup (3-way, neutral, toggle) and I experience the same thing. I was able to get mine replaced under warranty. @Eric_Inovelli this is honestly starting to sound like a trend. You might start setting aside these returns to see if there is a hardware failure mode that is consistent.