Title page and Abstract link to the same page?

I am writing a thesis and I would like to put the title page and abstract into the table of contents. However, my title page hyperlink and abstract hyperlink both link to the title page.

Here is my main Latex file:

% main.tex================================================================

%preamble
documentclass{my_thesis}

% preamble contains title page, signature page, acknowledgment and abstract texts
usepackage{import}


% Pacakges used
usepackage[utf8]{inputenc} % Remove warning on ascii conversion
usepackage[T1]{fontenc} % Remove warning on ascii conversion
usepackage[margin=1in,letterpaper]{geometry} % decreases margins
usepackage{float}  % for figure "H"
usepackage{amsmath}    % math
usepackage{hyperref} % hyperlinks
setlength{parskip}{0.5em} % paragraph spacing
usepackage{graphicx}   % figure
usepackage{subfig}
usepackage[nottoc]{tocbibind}  % put bib in the table of content 
usepackage{amsfonts} % for math equations
usepackage{array} % table
newcolumntype{M}[1]{>{centeringarraybackslash}m{#1}}
usepackage{listings}   % code

newcommand{myparagraph}[1]{paragraph{#1}mbox{}} % paragraph with line break

begin{document}

    % title page-------------------------------------------
    input{./Chapter_title/title_page.tex}
    addcontentsline{toc}{chapter}{Title Page}
    % ----------------------------------------------------

    % abstract -------------------------------------------
    input{./Chapter_abstract/abstract.tex}
    addcontentsline{toc}{chapter}{Abstract}
    % ----------------------------------------------------

    % acknowledgement ----------------------------------------
    input{./Chapter_acknowledgement/acknowledgement.tex}
    addcontentsline{toc}{chapter}{Acknowledgement}
    % ----------------------------------------------------

    % generate table of contents ============================
    setcounter{tocdepth}{5}    % set the depth of table of contents
    tableofcontents
    % ======================================================

    input{./Chapter_introduction/introduction.tex}

    ...

end{document}

My title page file:

% title_page.tex================================================
thispagestyle{empty}
begin{titlepage}
    begin{center}
        vspace*{1cm} 
        
        { huge
            textbf{My Ttile}
        }

        ...
                
    end{center}
end{titlepage}

My abstract page file:

% abstract.tex=================================================
thispagestyle{plain} 

begin{center}
    vspace*{1cm} 
    
    { Large
        textbf{My Title}
    }
    vspace{0.4cm}
    large

    by 
    vspace{0.4cm}
    textbf{XXX}
    
    vspace{0.9cm}
    textbf{Abstract}
    
end{center}

 My abstract...

By doing so, I am able to see Title Page and Abstract in my table of contents. However, in the generated table of content, the Title Page and Abstract share the same page number 1 (see the figure below)? But I used thispagestyle{empty} in the title_page.tex and there is no page number on the title page. The first page starts with the abstract page. And the hyperlinks of Title page and Abstract both link to the title page. Can anyone tell me how to fix this? Thank you!

Edit:
I added a mini problem-replicate example here my_thesis if anyone want to have a closer look.