For months now, Writer has been underlining the first 3 words of every paragraph, and saying the sentence is too easy/short. It does not matter how complex the sentence is, it always does the same thing
Version: 22.214.171.124 / LibreOffice Community
Build ID: 30(Build:2)
CPU threads: 4; OS: Linux 5.18; UI render: default; VCL: kf5 (cairo+xcb)
Locale: en-US (en_US.UTF-8); UI: en-US
On Tumbleweed…but have seen this on earlier versions of Writer too.