Any known issues and fixes for Connectport hang problems?

please provide more details about your “hang” problem?
Which Digi product, which part number, which 5000xxxx-yy revision, which firmware? Is the problem solved with latest firmware and driver?
Are you seeing a driver hanging, or an application accessing a serial port through an (outdated) RealPort driver (Linux or Windows, which version?)?
Are you seeing the ConnectPort device itself “hanging” = no reply to which i/o? can you ping it, access the web page? No → did you run port scanners to put hight load on it?