As I mentioned, I don’t use Alexa to control my lock (a few reasons why, mostly because I work from home and have it set to auto lock if unlocked for 15 minutes) but my Lock gateway is plugged in in my home office, and I have noticed it going offline by the blinking red light a few times in the last few days. Ultimately the Wyze Lock reconnects with no user interaction, but it’s worth making note.
(I will preface this next comment with, I have been making some configuration changes to my IoT WAP testing a different issue, so digest as appropriate )
Not sure if this could be the root cause of the Wyze Lock disconnecting from Alexa, but if you can, try to observe the lock gateway and see if you see yours is going offline, then if it is, check to see if it is disconnected from the Alexa app. I will do the same.
(I will postface with, I have not observed any of my other Wyze devices disconnecting and reconnected due to my IoT WAP configuration changes, unless of course I reboot the WAP, but also, they aren’t staring me in the face like the Wyze Lock Gateway )