ZXT-120 continuous beeping

hi ,

recently i bought several Zxt-120 to control the split air-Con in my Home .
They were installed in my Master room , kids room , studio and living room .

When i ask alexa to turn on air-con at master or living room , all is fine .

When i ask alexa to turn on air-con at studio and kids room , it seems the zxt-120 keeps transmitting the signal every 3-5 secs (because i can hear my aircon beeps) , even thought my AC already acknowledge by turning on itself . Sometimes to the extent of turning off my AC for no apparent reason .

i checked all the ZXT-120 units are running on the same firmware 6,3,42,1,12 . And IR code is 367 for Daikin which is identical to whats been set for my master room .

Can anyone advise me what is causing this problem ?

I am having exactly this issue with both of my ZXT-120 and my VeraEdge. Any signal sent results in 10-30 beeps on the unit - it never gets the answer that the message made it and so it keeps trying to send it. Vera support was completely unhelpful.