Should I upgrade my AV Receiver?

 I have the Onkyo TX-NR509 5.1 AV Receiver which I've own for about 10 years now. For over 5 years, I've had random audio dropouts with this receiver when using the HDMI ports. And here's the funny thing, it happens once in a blue moon... maybe once every 6 months or so. That's how rare it is. And in the over 5 years it has been happening, it hasn't gotten worse. Truth be told, deep down inside, I've hoping that it does get worse so it gives me a reason to upgrade to a 4K AVR, but it still only happens rarely. I've switched to different cables, different ports and even upgraded to a 4K TV a couple of years ago, and the dropouts still occur. So, it's obvious that the problem lies with the HDMI board on the receiver.

Given the fact that this is a problem that rarely happens, do you think it's time that I retire this AVR and upgrade? Or should I just save my money and put up with the dropouts since it rarely occurs. Was thinking of maybe upgrading to the Yamaha RX-V385BL.