If you connected the main hdmi out from the 95 to the 4300, the 4300 should get it's sound from the 95 just fine. Are you connecting the main hdmi out on the 95 to the TV and then using the TV ARC to the 4300? I Not enough information about your set up and connections to tell what might be the problem and I also don't understand your statement we connect all our devices to the 4300 with ARC. Not all device have ARC, just TVs usually.
The way I do it, is I connect the main HDMI out from the 95 to the TV and then connect the secondary hdmi out of the 95 to my receiver. Sometimes I watch a movie without the receiver just using the TV sound or headphones and sometimes I listen to CDs and don't want the TV on. That gives you the most flexibility.
You also might get a quicker response and better response than mine by posting in the 95 owners thread.
Supercharged Song Towers, Oppo BDP-203, Anthem MRX-520, LG B6 OLED
Headphone Rig: Oppo BDP-95, Burson Audio Soloist MKII Headphone amp/ Sennheiser HD800S, Sennheiser HD650