Found the bug! In LayoutSlip.getLayoutConnectivity() the DOUBLE_SLIP is limiting BD instead of BC:
This line (¡Ö1847):
? ? ? ? ? ? if ((type == DOUBLE_SLIP) && (lbB != lbD)) {
should be:
? ? ? ? ? ? if (lbB != lbD) {
And this line (¡Ö1863)
? ? ? ? ? ? if (lbB != lbC) {
Should be:
? ? ? ? ? ? if ((type == DOUBLE_SLIP) && (lbB != lbC)) {
I'll submit a PR asap¡