@noble100 - do you just connect Ethernet port of Synology with Ethernet port of OPPO ? Does you Synology device contain some kind of network hub? and why do not connect OPPO to a router you connected Synology NAS to? I have Synology 414 and did not know about that type of functionality (it does have 2 Ethernet ports, but I thought it is for doubling the speed with routers supporting such feature)...
Interesting.
Interesting.