If it’s an FTDI driver stack/interaction problem as expected, FWIW another potential workaround for desktop PC users is to install a 1-port PCIe serial adapter card (e.g., StarTech PEX1S953LP is ~$40 - same price as PerfPro bridge).
Advantages: You don’t need to buy 2x ANT+ adapters (~$30), worry about driver/stack maintenance/support issues with PerfPro SW stack and/or ANT+ adapter drivers, or introduce an unneeded wireless link.
Disadvantages: It will ONLY work with PC apps, and not with other wireless devices that support ANT+ FE-C. Obviously, you need a desktop PC with a spare PCIe slot.