Attachments empty for certain file types

[ivarbt]

I've built a flow that sends an email with attachments, and is triggered by a http request. The request contains the subject, message, and an array called "files" with the file name and base64 encoded files content.

- I initialize an array (called "attachements") in the flow

- I loop the "files" array from the input and append it to "attachments" like this:

  {

     "name":"somename.txt",

     "ContentBytes" : "<use the decodebase64 function to decode the base 64 string>"

   }

- I use the "attachment" array as attachment input to the outlook action "Send an email (V2)"

I've tried sending several file types, and txt files shows up ok.

With PDF attachments are just blank, and xlsx and docx files are unreadable.

Any idea how I can make this work with all file types?