Teraterm bug: Some characters make main output works bad. REOPEN
You have closed my ticket but I think you do not have analysed it before.
Please is so simple as make a serial loop and send teraterm_bug4.txt
With others software like realterm does not happen so I think it is not a hardware problem. But I like more your software.
Think that you have some language detection inside your software that changes when some certain characters are detected. If it is so please give the chance to disable this automatic feature.