Sorry, late to reply
In fact, “This problem occurs automatically without modifying any process content” means that,I just tried to expand the sequence in the process without modifying any content. At that time, the editor prompted that there were some modifications. I tried to save the modifications, and then the symbol “�” were be introduced. Sometimes, the symbol “�” even occured during the flow was running, without any operating. I tried to correct the “�” by using “Edit XAML”. I copied the XAML content into vs code and replaced “�” with correct CJK characters. Then, I pasted the corrected XAML content to “Edit XAML” box. After that, I tried to save the modifications, and then the symbol “�” still existed.
（1）Actually, the workflow was created by using copying. Then I tried to modify the name. In the source workflow, no image was introduced, and the CJK characters were also typed manually.
（2）The culture of the workflow was settled as Chinese.The operating system of local PC is WIN10. The regoin was settled as Chinese and the settings “Beta: Use Unicode UTF-8 for worldwide language support” was chosen.
I cannot force the problem to be reproduced. The probability of this problem occurring is high, but it is not necessarily 100% reproducible.