Someone created an issue regarding this problem on the GitHub repository:
ImageResizer interferes directly with the copy-paste process, so it is reasonable to assume that the add-on is incompatible with 2.1.44 and has to be updated by the author.
You have two options:
Keep ImageResizer disabled on Anki 2.1.44…
Stay on a previous Anki version…
…until the add-on is updated.
It depends on how important that add-on is to your workflow.
That add-on is not about copy-pasting text in the editor, but about duplicating whole notes.