can't change MQTT FullTopic

[aferraz]

Describe the bug After upgrade to 6.4 two of my electrodragon device changed Mqtt FullTopic to "%topic%/%prefix%/"

Also, make sure these boxes are checked [x] before submitting your issue - Thank you!

• [X] Searched the problem in issues and in the wiki
• [X] Hardware used : electrodragon 2 relay board
• [X] Development/Compiler/Upload tools used : TasmotaAdmin
• [ ] If a pre-compiled release or development binary was used, which one? :
• [X] You have tried latest release or development binaries? : No
• [x] Provide the output of commandstatus 0 :

  STATUS 0 OUTPUT HERE - DO NOT DELETE THE MARKERS ABOVE AND BELOW THIS LINE

  esp18/stat/STATUS = {"Status":{"Module":15,"FriendlyName":["Termocamino","Sonoff2"],"Topic":"esp18","ButtonTopic":"0","Power":0,"PowerOnState":3,"LedState":1,"SaveData":1,"SaveState":1,"SwitchTopic":"0","SwitchMode":[0,0,0,0,0,0,0,0],"ButtonRetain":0,"SwitchRetain":0,"SensorRetain":1,"PowerRetain":1}}

To Reproduce Steps to reproduce the behavior: I try to change from console and web also: 22:00:08 MQT: esp18/stat/RESULT = {"FullTopic":"%topic%/%prefix%/"} 22:00:35 CMD: FullTopic %prefix%/%topic%/ 22:00:35 MQT: esp18/tele/LWT = (retained) 22:00:35 MQT: stat/esp18/RESULT = {"FullTopic":"%prefix%/%topic%/"} After Reboot 22:01:04 CMD: fulltopic 22:01:04 MQT: esp18/stat/RESULT = {"FullTopic":"%topic%/%prefix%/"}

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[aferraz]

Sorry, find a solution: setoption19 0