I think op's referring to this "bug" from hwfly's aliexpress page:
View attachment 341158
It means if you plug the usb ribbon cable the wrong way (upside down) it will fry the usb port on the modchip. However the chip should still glitch just fine. v4.1/v5 chips adds some protection circuit in case you plug the usb ribbon cable upside down.
However, other claims they make about v4 chip is wrong and misleading. V4 chip does work with Toshiba emmc, I just installed one last week. Doesn't have the fastest glitching time like samsung but it works. My seller on taobao also confirmed this. As for v1 support, I think you need to use their original firmware, not hwfly-nx firmware.
According to my seller on taobao, v4.1/v5 chips are made by another manufacturer and has more problems than v4. They don't even sell v4.1/v5 chips on taobao, just on aliexpress. So I'd suggest avoid these v4.1/v5 chips and stick wth v4.
(Btw I'm buying directly from taobao because it's cheaper and I can pick up other stuff like joycon sticks, shells and other accessories and combine shipping, much cheaper and faster than aliexpress)