Stuck on last bar of pattern 6

Hi all. in the grid mode I’ve created 7 patterns to make a full song. It seems to play through OK but when I click through the individual chords they all play OK.
That is until I get to Pattern 7, bar 8 when it just plays the bar 7 chord instead. If I try and create pattern 7 I can drag on new chords but if I press on them they still just play pattern 6 bar 8.

Is this a bug?