Bluetooth question and maybe a problem?

Hey so I have my G5 connected to my trucks head unit through Bluetooth, everything works fine except every time I go to use it I have to disconnect Bluetooth on my phone then reconnect it in order to get sound, it is like that with all my bluetooth deceives I use with the G5. No it isn't the biggest deal only takes an extra 10 seconds but it is still annoying and I have no clue why it doesn't stay connected like my G2 did,

Anyone else have this problem?