cannot find some marks

[oxygen-berry]

I often encounter the situation where I can't find the corresponding id after splitting the mark. Is there any solution? For example, I can't find where ‘a’ is in this picture

[jwyang]

@oxygen-berry can you provide the original image so that I can have a test?

[oxygen-berry]

@oxygen-berry can you provide the original image so that I can have a test?

Here is it. Granularity is 1.7.
But it also has this problem in other granularity cases. Looking forward to your reply！