Out of curiosity, does this happen with the transparency option selected in the export menu? When you import that file back into Corel does it read CMYK or RGB? I was having very quirky issues with X4, Tiff files, and a macro. I thought my issue initially was connected to color management, but nothing I tried corrected. I'm still unable to get proper results with Tiff's and transparency. You can read all about it in X4 areas posts, (you can't miss as I believe it's the longest thread there). I'm too busy to spend anymore time chasing the issue (reinstallation of X4 is my next best shot), so I went back to working on version 12, which I haven't had any issues with (probably just jinxed myself saying that)!