popping/clicking sound when upsampling???

[Dean Shias]

For the past 4 to 5 months on my OPPO UDP205, at least that I've been noticing, whenever I upsample files, especially up to 768khz, there is a popping/clicking/skipping sound (like a static pop on a record) that appears. I ignored it for a while until now where it's actually affecting the listening experience. I've been always upsampling with no prior issues, at least that I can remember. I've tried it with JRiver, Roon, other players, I tried it on a new computer, bypassed audiophile USB Matrix Audio Element H card, reinstalled windows, tried Audiophile Optimizer, tried Fidelizer, another laptop, from my phone, reset drivers, tried every setting recommended on windows and players, and still persists, on both analog outputs. The only constant that I can see is the Oppo. Has anyone experienced any issues with this before? with a resolution? Any insight would help.

[Dean Shias]

Rolled back the firmware and solved the issue. Thanks.