Note from マイコー/Michael: due to a potentially severe illness, it is quite possible that I will not be able to respond to bug reports in a timely manner. However, I do encourage you to post here, as there are many wonderful members of our community who should be able to help.
Starting today when I do daily review, this kanji canvas somehow became draggable. I had no trouble before and for now, can type the answer as a workaround. Not sure if it's just me or do other folks share the same experience?
I use Firefox 141.0 (64-bit) with add-ons disabled.