Just downloaded and installed 188.8.131.520, same bug is still present at least with DVD+RW-disk's.
Eg.Data disk->Burn->advanced options->Disc at once+finalize disk+eject disk. Result in multisession disk, CDBXP ask is one want's to continue multisession disk when same disk is inserted again. Disc information says "Disc status: Disc open", "Disc is open: Yes" and "Number of sessions: 1"
Purchasing Nero license is just inches away;)
edit: same result with automatic option and "Finalise disk" selection.