Click the Morph button at the left to show the morphing section at the upper right, then drag the handle in the middle of the morph control area from left to right to hear the level of each source crossfade.
The default view shows XY set to crossfade, not morph, between the sources.
Select one of the two morph buttons in the morphing section to access the elemental morphing controls. Because there are only two sources, click the Morph Linear button, then click the A-B button to limit morphing to these two sources.
Switch off Bipolar mode for the LFO, and set Rate to the same number of PDF
Logic Pro Instruments: PDF