Reset the active strip offset and scale, in the "Set Render Size" operator (`SEQUENCER_OT_rendersize`). This ensures that the active strip will actually fit the new render size, which is what the operator is intended to achieve.
Reset the active strip offset and scale, in the "Set Render Size" operator (`SEQUENCER_OT_rendersize`). This ensures that the active strip will actually fit the new render size, which is what the operator is intended to achieve.