ret and tab and sort hang emacs. previously i got Error running timer `org-element--cache-sync': (wrong-type-argument integer-or-marker-p nil).
tdoq at hang produces this (not running on source only): Debugger entered--Lisp error: (quit) org-element--cache-compare... avl-tree--do-delete(org-element--cache-compare... avl-tree--do-delete(org-element--cache-compare... avl-tree--do-delete(org-element--cache-compare... avl-tree--do-delete(org-element--cache-compare... avl-tree-delete([cl-struct-avl-tree-... ... org-element--cache-process-request([30317 37858 46912 -21480 (drawer (:begin 46764 :end 46912 :drawer-name "LOGBOOK" :contents-begin 46776 :contents-end 46900 :post-blank 0 :post-affiliated 46764 :parent nil)) 0] 55567 1 nil nil) ... org-element--cache-sync(#<buffer executive--a.org> 1) org-element-at-point() org-hide-block-toggle() org-hide-block-toggle-maybe() run-hook-with-args-until-success(org-hide-block-toggle-maybe) org-cycle(nil) call-interactively(org-cycle nil nil) command-execute(org-cycle) cache reset sometimes fixes it for a while.