While using mathquill4quill on a mobile device, it is not possible to delete or edit the Formula once it's created. Technically you can't even highlight it. Trying to delete it dismisses the keyboard. The issue also occurs here on the live demo.
Thanks for reaching out. Editing a formula isn't supported in Quill currently so there's not much we can do in this extension unfortunately. See #80, #71, #54 and #17 for more context.
While using mathquill4quill on a mobile device, it is not possible to delete or edit the Formula once it's created. Technically you can't even highlight it. Trying to delete it dismisses the keyboard. The issue also occurs here on the live demo.