No whitespace for authors with two given names

Question

I am using bibtex and discovered (days before I have to submit the thesis) a problem.

An example would be this:

Document:

\documentclass[12pt,a4paper]{report} 
\begin{document}
Single name \cite{single}.
Double name \cite{double}.
\bibliographystyle{abbrvdin}
\bibliography{bibexp}
\end{document}

Bibexp.bib:

@article{double,
    title = {Title of the paper},
    journal = {Journal of WTF},
    author = {First, A. and Second, A. A.},
    year = {2019}
}
@article{single,
    title = {Title of the paper},
    journal = {Journal of WTF},
    author = {First, A. and Second, A.},
    year = {2019}
}

I am getting this:

I know I can delete the whitespace between the authors and the ";" by using this method How to “delete” space between Author and semicolon in bibtex

but with my limited tex knowledge, I couldn't find a way to handle the inconsistency for the whitespace before the ": Title of the paper" Only if the last author has two given names there is no whitespace, if he has one given name there is whitespace.

Is there a quick fix (other than to change to biblatex for which I do not have the time...)? Thank you very much in advance and apologies if the question was already answered.