Crash when use it as serial port

[3b29ee03-158b-4554-b26d-931f7b3e6373.dmp](https://github.com/kingToolbox/WindTerm/files/13593446/3b29ee03-158b-4554-b26d-931f7b3e6373.dmp)
I use windterm as serial port. Usually, I have three serial tabs are running, and crash after hours. The scrollback lines setting is 13k, and baudrate is 921600. The CPU loading is 15~30%.
Something interesting is that it will not crash if I minimize the windterm window.
My system is windows10 with windterm 2.6.0 p5

Start by inspecting the attached crash dump and reproducing the report on Windows 10 with three serial tabs, 13k scrollback lines, and a 921600 baud rate. Compare behavior while the WindTerm window is visible and minimized; done means the crash is understood and no longer occurs under the reported conditions.

Written by the indexing model from the issue text.