Running FreePBX 14.0.1.24, asterisk 15.1.5 and again I’m happy.
When using Authenticate I encounter unexpected audio which is not in line with my plan 
exten => s,1,Playback(custom/menu)
exten => s,n,Wait(1.5)
exten => s,n,Playback(custom/code)
exten => s,n,Authenticate(1234,4)
exten => s,n,Dial(SIP/100&SIP/101,60)
exten => s,n,Hangup()
I read about the prompt option in Authenticate, but it is not clear because I heard (I think) at least 3 separate prompts, depending on the executed input (Wrong input & Please provide input & Goodbye). These prompts are not from my custom set, so that needs to be changed.
Did anybody had the same issue ? How can this be resolved ? Which prompt files are being called under which condition ?
Thanks for you help