Push to talk button and long delay

[OH-LXD 0]

Hello,  I'm having a problem with push to talk command and very long delay after pushing it.  Everything else seems to work normally. When I push my joystick button which is programmed to push to talk, I have to wait 8 -15 seconds and then I hear the connection sound and I can talk.  It works then ok.  What could cause the delay? 

[503Kento 11]

Does it happen all the time? I have this same issue but intermittently. I’ve always attributed it to a busy system.