Hi, I'm using Xara Designer Pro X 18.0.0.61642  DL x64 Mar 18 2021

PNGs are exporting in my web designs with boxed graphics around them. It appears to be part of whatever graphics are in the background of the design.

Operating system:
Windows 10 Pro 64-bit
AMD Ryzen 9 3900X 12-Core Processor
65536MB RAM
AMD Radeon RX 5600 XT

Thanks