unexpected internal errors for simple html input

[voborl00]

I am facing weird internal ckeditor errors while using pretty simple html fragment. Replicable by pasting following code samples to online classic editor example (https://ckeditor.com/docs/ckeditor5/latest/examples/builds/classic-editor.html) or using default classic editor offline.

snippet.js:4 Uncaught TypeError: Cannot read property 'childCount' of null
at se.e.on.priority (snippet.js:4)

and

Uncaught CKEditorError: model-position-parent-incorrect

with "foo" replaced by

foo

(foo enclosed in paragraph tag)

original code

foo

[voborl00]

html code in attached txt file

template.txt

[voborl00]

altered foo in paragraph attached

template2.txt

[Mgsy]

Hi! Thanks for the report, we're aware of this issue and actually, it has been fixed - #8098. It will be released with the next CKEditor 5 version which is planned to be published on October the 28th, so stay tuned!