In ArcGIS Pro 2.1.1 the quality of the basemap after exporting the layout to a pdf file is very poor and seems be to converted into tiles (which sometimes are even rendered individually at different quality). Everything but the basemap is in a very fine quality, it's basically just the basemap.
When I create a complete new project, with a fresh basemap and a new layout file, the quality of the basemaps (any arcgis online basemap) after exporting is very poor. When I export the image from the map view, however, the quality is fine (just as displayed on the screen). The quality on screen in the layout view is fine, it's the pdf file where the problems occurs.
I have tried multiple basemaps and nearly all possible combinations in export settings, but the problem persists. The issue started to happen just a few days ago, before this I've never had this problem before.
Has anyone had similar issues and/or could anyone suggest a solution?