We used aspose.words for mail merge purpose on windows and linux platform, developed as .net core application (used aspose.words 18.6.0) We have a template with image on it (png image). After mail merge, we save document as html with ExportImagesAsBase64 = true in HtmlSaveOptions. When we run this application on windows platform, output html file has correct png image on it (as correct base64 string). But when we run this application on linux platform, image is distrupted. On every run, html output has different base64 strings. How can we fix this issue?