VGA monitor constantly losing sync w/ SNES in line 4x “256×240 optim” mode.

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    As the title implies my modded 1-Chip SNES seems to have trouble keeping sync with my VGA monitor in anything above 2x on 256×240 optim mode. If I go to 4x mode (1280×960) the monitor loses sync immediately. However, if I change it to Generic 4:3 it stops and has capture but then the aspect ratio is wonky. The real kicker is at 4x mode with 256×240 optim, I don’t lose capture on my elgato HD60 Pro (I have the capture on my OBS) and the light stays green on my OSSC. Any idea why it’s having trouble? I know there’s that de-jitter issue, but I’m not sure if it’s what’s causing it since I have a stable sync on my capture and OSSC. Since it’s being initially fed a 1280×960 signal it shouldn’t have any issues since I have no problems doing 4x with my PS1 or 2x with my Wii at the same resolutions. Thoughts on this?

    Not sure if it matters but here’s my connection chain.

    SNES>Scart>Scart Switcher>Scart Switcher Out>OSSC>HDMI>HDMI Splitter>Split 1>HDMI to VGA adapter>VGA Monitor
    >Split 2>HDMI to Elgato HD60 Pro Capture Card

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