Hi there I hope have found the solution to your problem but if you haven't found anything yet then have you tried this html code to fix this issue because once it happen to my site page (
https://gbapps.net/fmwhatsapp-apk-download/) and I have fix the issue with this html code.
@Html.TXTextControl().TextControl(settings =>
{
settings.Dock = DockStyle.Fill;
}).LoadText(Server.MapPath("~/App_Data/Documents/editing_tables.tx"),
StreamType.InternalUnicodeFormat).Render()
<button onclick="InsertTable()" class="btn mt-3 btn-success">Insert Table</button>