TinyMCE error

Beta
#1

This popped up in the browser console when I entered HTML mode in a text field:

TinyMCE Error TypeError: can't access property "getRng", e is undefined
    uh https://***/wp-includes/js/tinymce/tinymce.min.js?ver=49110-20201110:2
    uh https://***/wp-includes/js/tinymce/tinymce.min.js?ver=49110-20201110:2
    focus https://***/wp-includes/js/tinymce/tinymce.min.js?ver=49110-20201110:2
    focusActiveEditor https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:27
    componentDidUpdate https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:27
    Jr https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Zr https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Gr https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    xl https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    xl https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    fl https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Nn https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    ul https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    ul https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    al https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    qt https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    onClick https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:27
    Xa https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    B https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    W https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    qe https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Ke https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Je https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    dl https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    V https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Je https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    pe https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    fe https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Ze https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Xe https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Ge https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    Ge https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    createRoot https://***/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1:10
    T3 https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:1
    rBe https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:149
    C1e https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:149
    C1e https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:149
    b https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:1
    <anonymous> https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:149
    <anonymous> https://***/wp-content/themes/pro/cornerstone/assets/js/app.react18.7.7.0-beta2.js?ver=7.7.0-beta2:149
app.react18.7.7.0-beta2.js:27:277401
#2

I wasn’t able to recreate. It sounds like a race condition though and might not happen everytime. Was this in Chrome?

#3

It was in Firefox.