Re: [O] 8.3 hangs

[Samuel Wales]

it is not consistent, and all of my org files are >500k
and private.

so althought it might be useless perhaps this lets you know
there is an issue.

here is another:

Debugger entered--Lisp error: (wrong-type-argument integer-or-marker-p nil)
  byte-code
  org-element--parse-to(524592 t (21955 39032 710872 158000))
  byte-code
  org-element--cache-process-request([524614 524614 nil -22 nil 1]
524634 nil (21955 39032 710872 158000) nil)
  byte-code
  org-element--cache-sync(#<buffer CAPTURE-other--a.org>)
  apply(org-element--cache-sync #<buffer CAPTURE-other--a.org>)
  byte-code
  timer-event-handler([t 0 0 600000 nil org-element--cache-sync
(#<buffer CAPTURE-other--a.org>) idle 0])