Note that sometimes ctrl+F5 fixes this but sometimes it doesn't!!
Some short abcjs snippets are being rendered wildly incorrectly, with a (constant) weird preamble. I will lead with a screenshot of the meta question for abcjs documentation :
Note in particular the sequence of notes actually rendered: C e a e d a (with a turn) a C
Here is a live short snippet:
X:1
M:4/4
L:1/4
K:C
C C C C | D D D D | E E E E | C C C C | D D D D | E E E E ||
Note the exact same preamble, and you can also see CCCC etc being rendered (albeit in the wrong duration)
It seems to be linked to too short a snippet but I don't know a good cutoff length, or what other features might trigger / not trigger the problem.
