PNG assets with transparency not rendering properly - different quality after link share in dev mode

I have encountered a problem with png files that contain transparency. The quality of PNG files that the developer downloads significantly differs from the quality of PNG files that are in the XD application. The files exported from the application also look good. The problem arises when sharing the development link. The files when downloaded from such a link seem to have anti-aliasing disabled and have a black border around the objects. It seems to me that the problem lies on the side of the server hosting the assets? Are the files there additionally compressed? This is a brand new problem for a few days, I have not seen such errors before.