https://bugs.winehq.org/show_bug.cgi?id=38204
--- Comment #3 from kotomixkyou@gmail.com --- (In reply to Bruno Jesus from comment #2)
If you could reproduce the problem with a small piece of code and a loopback serial device it would be simpler for others to reproduce.
Unfortunately the problem is mainly with how this program / device expects specific lengths of packets / data to be read after transmitting into the device other specific packets. So I don't know how useful running a small piece of code on a loopback serial device would be.