Css position sticky not work if the parrent div have overflow hidden

Question

I try to make "position: sticky" work after "overflow: hidden"

For this design I can ONLY use CSS and these html tags: (a, p, i, strong, b, u, ul, ol, li, h1, h2, h3, img, font, br o span)

• DEMO: espected result (scroll down): https://videochatencasa.com/chat/27.html
• REAL result: https://chaturbate.com/bestprofile/
• MY complete code can be found on: https://videochatencasa.com/en/design-11-chaturbate-profile-already-created/

Please note: I cannot use any "script" and any other HTML elements, apart from those specified above.

I am looking for a CSS based solution.

Attention - I do NOT have access to modify the parent DIV (that have overflow:hidden). My code is just wrapped inside this div.