Adding link to image does not work

[kjoscha]

On Firefox:

1. select image
2. click insert/edit link
3. paste any url
4. click ok

editor crashes with error in console:

IndexSizeError: Index or size is negative or greater than the allowed amount tinymce.jquery.self-bd9d26783c0ac4f1fb89546041b36d152f990f2a7a338280dcc995b66f8005c4.js:15777
    jQuery 3
    
    setRng
    
    registerEvents
    
    setEditorTimeout

it seems to be related with this: tinymce/tinymce#3469
Thus, tinymce has to be updated?!