This change seems intentional to me:
https://github.com/discourse/discourse/commit/227a49bb328ef6a4be5f2893eb7c3a7e5897fccc
@vinothkannans didn’t link to a meta discussion but it seems like the commit intented for TL4+ users to hide posts automatically unless they were made by TL4.
@vinothkannans do you remember why this was done?