Hi,

I resend my report with now hopefully all information to reproduce it quickly.

Inline tasks are a great feature of org-mode, very useful to include tasks in all sorts of documents without interfering with the document structure.

0. emacs -Q
1. Insert the below snippet into scratch buffer.
>>>
* Example
** heading 1
xxxxx
** heading 2
*************** TODO Test access with provided credentials
xxxxx
*************** END
** heading 3
*************** TODO State "high value" targets
xxxxx
*************** END
** heading 4
xxxxx

(org-mode)
(require 'org-inlinetask)
<<<

2. Execute each of the 2 elisp statements at the bottom (C-x C-e)
3. Cycle Example to show children
4. Cycle heading 2

This should show the issue: Parts of heading 3 are expanded too. This is also true for the next to cycling steps. Then comes a correct full cycle and the issue repeats. 

This garbage shown from the next heading(s) can become huge in more complex structures.

Org mode version 9.4.6 (9.4.6-gcf30f7

Please confirm the issue.

Regards,
Michael