I'm noticing that a new feature in v8.4.6 for visually tracking real time changes to a file in np++ is having compatibility issues with 3P. It's suppose to color code lines in the margin but with 3P, the entire line is getting the color coding.
I found this page that helps me disable this feature.
https://community.notepad-plus-plus.org/topic/23616/faq-desk-new-change-history-feature