Images don't display, that used to display

We are using the .net framework and C# to generate the documents. InsertHtml is replacing images with a placeholder. This used to work fine and we have not changed any code, but our client has come back to us after using it over and year and said that some of the images are no longer displaying. What they get is just a white box with a red x, where the image should be.

The rest of the document seem to work fine, it is just that some of the images are missing. We have tried updating to the latest stable nuget package, with no success.

@BDAWNB

Thanks for your inquiry. To ensure a timely and accurate response, please attach the following resources here for testing:

  • Your input Word document.
  • Please attach the output Word file that shows the undesired behavior.
  • Please create a standalone console application (source code without compilation errors) that helps us to reproduce your problem on our end and attach it here for testing.

As soon as you get these pieces of information ready, we will start investigation into your issue and provide you more information. Thanks for your cooperation.

PS: To attach these resources, please zip and upload them.