Vertical text display for Posts listing in Admin

Each character of a Post title is on a separate row. It’s like each character has a return character between it and the next. This causes one giant row for each post and the title is unreadable because the characters of the title are stacked one on top of the next. This does not happen on the Pages listing. The Pages lisings are fine. I’ve been through the config settings and nothing works. The only solution is to deactivate the plugin.