I'll fix in next update. In the interim, the following javascript should clean it up if you can access developer tools console in your browser
let r = location.href.split('/').slice(-1)[0];let s=`${r}.textchat`;let a=JSON.parse(localStorage.getItem(s));let b=[];for(let c of a){if(!c[1].includes('||'))b.push(c)};localStorage.setItem(s,JSON.stringify(b));