Test Failed: strings_spec.lua

Run nvim --headless -c 'PlenaryBustedFile tests/plenary/strings_spec.lua' in a clean environment, then inspect tests/plenary/strings_spec.lua around lines 20 and 23. Compare the reported tab-width results with the expected values and confirm whether the failure reproduces without other plugins; done means the discrepancy is explained and the test passes.

nvim --headless -c 'PlenaryBustedFile tests/plenary/strings_spec.lua'

Testing: 	tests/plenary/strings_spec.lua	
Success	||	strings strdisplaywidth lua: ambiwidth = single, "abcde" -> 5	
Success	||	strings strdisplaywidth vim: ambiwidth = single, "abcde" -> 5	
Success	||	strings strdisplaywidth lua: ambiwidth = double, "abcde" -> 5	
Success	||	strings strdisplaywidth vim: ambiwidth = double, "abcde" -> 5	
Fail	||	strings strdisplaywidth lua: ambiwidth = single, "abc	de" -> 10	
            tests/plenary/strings_spec.lua:20: Expected objects to be the same.
            Passed in:
            (number) 6
            Expected:
            (number) 10

            stack traceback:
            	tests/plenary/strings_spec.lua:20: in function <tests/plenary/strings_spec.lua:19>
            	
Fail	||	strings strdisplaywidth vim: ambiwidth = single, "abc	de" -> 10	
            tests/plenary/strings_spec.lua:23: Expected objects to be the same.
            Passed in:
            (number) 6
            Expected:
            (number) 10

            stack traceback:
            	tests/plenary/strings_spec.lua:23: in function <tests/plenary/strings_spec.lua:22>
            	
Fail	||	strings strdisplaywidth lua: ambiwidth = double, "abc	de" -> 10	
            tests/plenary/strings_spec.lua:20: Expected objects to be the same.
            Passed in:
            (number) 6
            Expected:
            (number) 10

            stack traceback:
            	tests/plenary/strings_spec.lua:20: in function <tests/plenary/strings_spec.lua:19>
            	
Fail	||	strings strdisplaywidth vim: ambiwidth = double, "abc	de" -> 10	
            tests/plenary/strings_spec.lua:23: Expected objects to be the same.
            Passed in:
            (number) 6
            Expected:
            (number) 10

            stack traceback:
            	tests/plenary/strings_spec.lua:23: in function <tests/plenary/strings_spec.lua:22>
            	
Success	||	strings strdisplaywidth lua: ambiwidth = single, "アイウエオ" -> 10

It may be related to my other installed plugins or not. Please Run this Test to confirm this issue.