... got an easy workaround. My TCStart.btm file used to have a statement "Set TitlePrompt=PID %_PID %@IF[%_X64 == 1,64,32]-bit". However, that recently stopped working entirely (I don't know exactly when). However, it does have an easy workaround (Title PID %_PID %@IF[%_X64 == 1,64,32]-bit), but I'm really curious while "Set TitlePrompt=..." no longer works.