Hi Ihor,

Here are some diagnostic messages I just received when opening a file
called scratch.org:

  org-element-cache diagnostics(scratch.org): Recovering persistent cached
element: "(keyword (:standard-properties [1 1 nil nil 22 0 nil top-comment
element t nil nil nil nil #<buffer scratch.org> nil nil (section
(:standard-properties [1 1 1 1160 1160 0 nil first-section element t nil 1
1160 nil #<buffer scratch.org> nil nil ...] :fragile-cache nil))] :key
\"TITLE\" :value \"Scratch.org\"))"

  org-element-cache diagnostics(scratch.org): Recovering persistent cached
element: "(section (:standard-properties [1 1 1 1160 1160 0 nil
first-section element t nil 1 1160 nil #<buffer scratch.org> nil nil
(org-data (:standard-properties [1 1 1 11872 11872 0 nil org-data nil t nil
3 11872 nil #<buffer scratch.org> nil nil nil] :path \"/Home/ps/scratch.org\"
:fragile-cache nil :CATEGORY \"scratch\"))] :fragile-cache nil))"

  org-element-cache diagnostics(scratch.org): Recovering persistent cached
element: "(org-data (:standard-properties [1 1 1 11872 11872 0 nil org-data
nil t nil 3 11872 nil #<buffer scratch.org> nil nil nil] :path \"/Home/ps/
scratch.org\" :fragile-cache nil :CATEGORY \"scratch\"))"

  org-element-cache diagnostics(scratch.org): Loading persistent cache for
~/scratch.org