Yesterday, I installed a WYZE color A19 bulb and created 4 Alexa voice activated routines on my iPhone 14 Pro to change the brightness (50 or 100) and color (blue or cool white). If I manually press on the routines within the Alexa app, they all work perfectly. If the bulb is on cool white, I can issue verbal commands to change the brightness or I can tell it to change the color to blue and 100 or 50 brightness and the bulb responds perfectly. Once it’s blue, I can verbally change the brightness to 50 or 100 and it works perfectly. However, once it’s blue, neither of the 2 cool white verbal commands work; that is, it won’t go back to cool white once it’s changed to blue. I can manually press the Alexa routines and it will go back to cool white, but the verbal commands will not change it to cool white.
Any suggestions as to how to remedy this issue?
That is wild. I haven’t seen this issue with my Google voice commands.
Has support been made aware of your issue? Logging it may help.
Hopefully someone will chime in to offer hope.
Welcome to the Forum, @perking812! 
I don’t have any suggestions for a fix, but I do have a comment and a question.
The comment: I think I experience similar things sometimes when I tell an Echo device to turn on certain (non-Wyze) lights and the lights don’t turn on; however, if I pull out my phone, open the Alexa app, and tap on the tile for that same light group in the Favorites section on the home screen, then those lights will turn on. I don’t know why this happens, but I think the problem is on Amazon’s end.
The question: Why are you using voice commands to trigger your light-changing routines? I’m not saying that this is the wrong way to do things, and I think using routines (like what you’re tapping in the Alexa app) are a convenient way to set scenes with lights. I’m just wondering why you’d use a routine triggered by a voice command instead of just telling your Echo device (or whatever you’re using for verbal commands) what you want the lights to do (e.g., “Alexa, set the lights to cool white.”). This makes me wonder how your routines are named (i.e., what trigger phrases you’re using) and if that’s causing Alexa to be “confused” somehow.
I still think Alexa’s device control has some issues, regardless (and at least a couple of longstanding problems between Alexa and Wyze devices come to mind). I recently had Alexa stop controlling some lights (yet another non-Wyze type) following a storm-related power outage even though Google Home had no problem with them at all after power recovery. In that case, I had to delete items from Alexa and add them back (wasn’t necessary to delete from their native app which is linked to Alexa via a Skill, because they continued to work there) in order to get Alexa—via Echo device or app—to be able to control them again.
Smart home stuff is fun, eh? 