Apparently this bug affects only some files. I attach the error log.
Checking session consistency (brasero_burn_check_session_consistency brasero-burn.c:1741) BraseroBurnURI called brasero_job_get_action BraseroBurnURI called brasero_job_get_action BraseroBurnURI called brasero_job_set_output_size_for_current_track BraseroBurnURI stopping BraseroBurnURI called brasero_job_get_action BraseroBurnURI called brasero_job_get_session_output_size BraseroBurnURI called brasero_job_get_action BraseroBurnURI called brasero_job_get_current_track BraseroBurnURI no burn:// URI found BraseroBurnURI stopping BraseroLibburn called brasero_job_get_action BraseroLibburn creating input BraseroLibburn called brasero_job_get_action BraseroLibburn unsupported operation BraseroLibburn deactivating BraseroLibisofs called brasero_job_get_action BraseroLibisofs called brasero_job_get_action BraseroLibisofs called brasero_job_set_current_action BraseroLibisofs creating volume BraseroLibisofs called brasero_job_get_data_label BraseroLibisofs called brasero_job_get_flags BraseroLibisofs called brasero_job_get_current_track BraseroLibisofs Adding graft disc path = /TCG Sterling - Colours Out Of Space 38 Metal Industrial Drumstep/, URI = file:///torrents/rss/TCG%20Sterling%20-%20Colours%20Out%20Of%20Space%2038%20Metal%20Industrial%20Drumstep%20Dubstep%20Breaks%20Electro BraseroLibisofs Found parent BraseroLibisofs Adding graft disc path = /TCG Sterling - Colours Out Of Space 38 Metal Industrial Drumstep Dubstep Breaks Electro/Distributed by Mininova.txt, URI = file:///torrents/rss/TCG%20Sterling%20-%20Colours%20Out%20Of%20Space%2038%20Metal%20Industrial%20Drumstep%20Dubstep%20Breaks%20Electro/Distributed%20by%20Mininova.txt BraseroLibisofs called brasero_job_error BraseroLibisofs finished with an error BraseroLibisofs asked to stop because of an error error = 1 message = "No parent could be found in the tree for the path "/TCG Sterling - Colours Out Of Space 38 Metal Industrial Drumstep Dubstep Breaks Electro/Distributed by Mininova.txt"" BraseroLibisofs stopping Session error : No parent could be found in the tree for the path "/TCG Sterling - Colours Out Of Space 38 Metal Industrial Drumstep Dubstep Breaks Electro/Distributed by Mininova.txt" (brasero_burn_record brasero-burn.c:2839)