With "Visueller Zeilenumbruch" (Visual Linebreak/LineWrap/Wordwrap?) activated, sometimes lines and line numbers are displayed twice or not at all.
How to do it with double lines: A) Create a document with 6 lines: 1: some content 2: blank 3: some other content 4: blank 5: some other content 6: blank
B) type more content in line 1 until the visual linebreak kicks in. then remove some content from line one until the text fits again into line 1. now line 3 is displayed twice. no navigate through the lines and watch line 3 being corrected and line 5 being displayed twice.
Sorry, I do not have a howto for missing lines. Will provide it once I have it.
Version is 1.30.1