Just a question: Would data=journal in /etc/fstab be a workaround until this bug is fixed?
(Unfortunatlly I can not set this option in fstab for the root-partition, because initramfs does not support that feature!), but you may try this with your home and what-else partitions, if you do have them.
Data=journal deactivates delaloc. It should put data and metadata into the journal, thereof I hope that recently opened files should not have 0 bytes size. I do not put further comments here from my side. It´s just an idea.