This goes beyond my knowledge of org-remember.
Maybe it has something to do with corrupt org-*-last-stored data if
the
last org-entry data is removed or changed? Just guessing here...
I tried to corrupt the data myself, then did bookmark-load and
org-remember C-1 C-c C-c but then it worked.
When looking briefly in org-remember.el I could not find any
bookmark-*
function call that looked like it was depending on its success.
Just so you have not forgotten: did you search all your org-agenda-
files
if the entry was misplaced somewhere?
Someone with better knowledge of org-remember then me can sort this
out?