I'm running V184.108.40.206 on 32bits application: it crashes all the time when port is closed.
Application was working fine with V220.127.116.11.
Tested on a simple application with same result: crash all the time COM port is closed.
Using C++ Builder 10 Seattle Update 1 on Windows 7.
Please fix as soon as you can.
Can you give us access to previous version please?