I started having this exact issue as of the update adding Shiv. It used to work perfectly fine but I can't get it to trigger even with a synthetic test in sandbox mode. The dash input is seemingly always preferred over the jump, and if I slightly delay the jump it does give the "Failed jump-dash timing" message. As far as I'm aware absolutely nothing changed with my setup and it broke with the patch. Tried resetting the configs, keybinds, and verified integrity, still no luck.