BUG: org-cycle does not unfold some subtrees

[Michael Dauer <mick.dauer@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 1050 bytes --]

Maybe I missed a known bug when doing the research. But all the other
reports describe different and reproducible behaviour.

Sometimes (often) I cannot unfold a subtree. It then affects only one or
more subtrees while others in the same buffer or even the same branch still
work. The only fix then is to either cut and paste the affected branches,
or to close and reopen the file.

While quite frequent I have not achieved to reproduce the issue. It just
happens after a while of using multiple files navigating with search, tab
from agenda, org-refile, and cycle.

Based on my analyses it's not the cycle functions, but must come from
broken text attributes. Even (org-fold-core-region (point-min) (point-max)
nil) does not unfold the affected subtrees then. Assuming that
(org-fold-core-region) is the only place where the folding and
hiding happens, I expect the problem there. But I understand too little
about the emacs internals to debug this function.

I hope this helps to fix the issue.

Org mode version 9.7-pre (release_9.6.4-327-gf81ba4

[-- Attachment #2: Type: text/html, Size: 1219 bytes --]