I am seeing this issue as well. This can be fixed a few different ways:
a) You can add the following to your index.php:
The replace is to get rid of the unneeded
b) You can remove
%postcontent% from the "Series Meta" field in the Options, and then add the following to any files where you want the Series Meta to appear (eg, index.php, single.php, etc.):
I'm not sure why it stopped working, and I can't see anything in the code that indicates an issue. I thought perhaps some filters that I have in my functions.php for
the_content_more_link might be the cause, but removing those (temporarily) didn't change anything.
I hope the above is helpful!