VMBGPO and locked channel

I have a VMBGPO with a wake up alarm locking CH1 on this same module. The unlock CH1 is programmed at wake up +15 min. Everything works fine, the channel is locked at wake up time and unlocked at wake up time +15 min.
I have another button on this module (CH9) programmed as Unlock channel (CH1) and it doesn’t work or let’s say channel 1 is always Locked and I have to wait 15 minutes to see the channel 1 unlocked. Even if I uncheck the locked button with velbuslink it stays locked.
Rev. of module is 1316
Any idea of what could be wrong?