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It’s a standard 60hz signal. The OSSC reads it at 59.18Hz.
That’s not a standard signal. ;-P
It deviates from standard by 0.8 Hz, more than any of your other boards. I’m now pretty sure it’s the refresh that exceeds the tolerance of your card and TV, causing them to apply frame conversion.
As I wrote earlier, try to match capture framerate with that of the board. For your TV, you will have to live with it or get another display. It’s also totally possible that the framerate tolerance of your sinks is different for different resolutions, so you should try all multiplication modes and see if it helps.