Delays in conversation with W52P

I have been checking the fórum but could not find any answer that helped me. I have recently purchased the Yealink w52p with one handset and everytime I make a call, there is a delay of about a second between when I say something and the other person hearing it and vicecersa. It does not happen when I use the BRIA4 softphone.

FYG, I am using MyPBX platform and the firmware of the base is 25.73.0.40 and handset 26.73.0.11