WLED is working just fine on quality ESP8266.
Unfortunately SW cannot always accommodate poor or inadequate HW.
Sorry but no sigar 
my channel setting is 6 and 11 and the esp8266 is still dropping wifi on 0.14.x
But stays stable on 0.13.x so not understanding the hardware reference here.
Those esp’s have had WLED upgrades for years and suddenly with 0.14.x they are faulty??