vindkaldar
I fixed it on my server changing img placeholders to the UTF symbol corresponding to the rank/tag, i use CMI in this case
You can find the UTF symbol using /e, /emojis or in your tags/ranks folder/file
After: '1': '%img_rankimgplaceholder% &f{displayName}&8 &7» &r{message}'
Before: '1': ' &f{displayName}&8 &7» &r{message} '
Again, this config is from cmi, chat.yml file, on the chat.GroupFormat section, other plugins like essentials may have a different workaround