Today, I have encountered the problem during find the copied “Tab character” from other program.
Here is the simple way to reproduce:
1. Copy the below strings, include one “Tab character”.
abc abcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefg
2. Paste above strings to EmEditor v17.1.2 Find dialog box, and click Find Next button.
(Not abc \t abcdefg…)
3. The status bar will be garbled.

If copy the strings with “Tab character” from EmEditor, then paste to Find dialog box, the result is same.