I have installed 5 pairs of three-way switches and all of them have the same problem. The auxiliary switch can turn the lights off but not on. If I turn the lights off with the auxiliary, when I turn them on with the master they turn off immediately two times in a row and then stay on the third time. If I don’t use the auxiliary to turn the lights off, the master switch works as expected.
The auxiliary switch for all of them is the Leviton VP0SR-1LZ. The master switch for four of them is the Leviton DZS15-1BZ and one is a Leviton VRS15-1LZ.
I have a neutral bundle in all the boxes. I used a voltmeter to ensure the master was connecting to the live black line. As far as I know I followed the wiring diagram that came with the switches. What I tried to do is connect the common wire and the wire that went to the red screw on the DZS15-1BZ to the BK screw on the the VP0SR-1LZ, the wire that went to the YEL/RD screw on the DZS15-1BZ to the YEL/RD screw of the the VP0SR-1LZ and added a pigtail to the neutral bundle in the box and connected it the WH screw on the VP0SR-1LZ.
All the bulbs are LED with 4 to 8 bulbs per switch.