Hi suburbanrelaps,
Thanks for confirming that you’ve already tried the previous troubleshooting steps.
One additional thing that may be worth trying on PC is completely closing any overlays and unnecessary background applications, as another program running in the background can sometimes interfere with the game.
You can follow this guide here: How to close background applications
Since you mentioned that the issue only happens when connecting to Ranked while other modes work normally, please let us know if closing the background applications makes any difference.
Thanks again for continuing to update us.