In this example, I copied Seq 2 to Seq 1 (both 1 bar only), saved both. Shifting pattern on Seq 2 works fine, alternate, different note lengths, blah blah.
The bug is on Seq 1. Try shifting pattern backwards, forwards, sideways, whatever. It will revert back to its normal state (1/16, forwards) after 1 bar is complete, even though it's not supposed to.
In other words, if you shift note length, change it's direction, etc, on, say, step 4 (1 bar pattern in this example), when it starts over at step 1, it reverts back to playing forwards at 1/16, even thought you didn't change it back to that state.
Maybe this has been mentioned but frankly I'm too lazy to search.