After upgrading vim plugins. It appears that some Plugins (Ace, Gitgutter, Coc) overwrite the line numbers. The following screenshot shows the problem at line 20. A '+' has overwritten the line number instead of being placed just before it.
Do you have any idea or fix about what could cause this issue ? Sorry the question is probably not really clear. The goal is to get help pinpointing the shared component that could be responsible for the incorrect display.