HASONEVALUE() question

Hi,

I'm having a few problems displaying a PDF in a report im currently working on.

Everything worked fine before the start of the weekend. However, when i tuned in this morning, something seemed to have broke on me.

I got to display a PDF through the PDF Viewer, and i got it working fine, showing the right PDF with multiple PDF's present in the source folder on SharePoint etc. 

However, for some reason, that does not seem to work anymore. I have tested around for a bit, and located the issue to most likely be due to how HASONEVALUE() works. I'm using this string to concatenate the split-up Base64 columns as a new column;

Base64StringConc = if(HASONEVALUE('Query2'[Name]), CONCATENATEX('Query2', 'Query2'[Pic], , 'Query2'[Index], ASC))

 

It works fine for a few refreshes when there is other PDF files present in the source folder, however, after a while it breaks and i get the mentioned white screen as output.

 

I wonder if there's an alternative way to filter which PDF i want in the Viewer, or if i made a mistake somewhere?

 

For reference, this is the data im working with right now; 

The file with the crossed out name is the one i want to be shown in my report. The source is a SharePoint folder as mentioned, where i have used Power Automate to fetch and rename a PDF every time an e-mail with a specific subject field and an attachment is sent to me, and replace the present PDF in the folder.