K3b in Leap15.3 will nicht isofile brennen

ASUS SDRW-08D2S-U BA01 (/dev/sr0, CD-R, CD-RW, CD-ROM, DVD-ROM, DVD-R, DVD-RW, DVD-R doppelschichtig, DVD+R, DVD+RW, DVD+R doppelschichtig) [DVD-ROM, DVD-R sequenziell, Zweischichtige DVD-R sequenziell, Zweischicht-DVD-R-Sprung, DVD-RW Eingeschränktes Überschreiben, DVD-RW sequenziell, DVD+RW, DVD+R, Zweischichtige DVD+R, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Eingeschränktes Überschreiben, Sprung zwischen DVD-Schichten] [%7]

System
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K3b Version: 20.4.2
KDE Version: 5.76.0
Qt Version:  5.12.7
Kernel:      5.3.18-150300.59.49-default

Used versions
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cdrecord: 3.2a09

cdrecord
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scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
SCSI buffer size: 64512
cdrecord: Warning: Cannot read drive buffer.
cdrecord: Warning: The DMA speed test has been skipped.
Cdrecord-ProDVD-ProBD-Clone 3.02a09 (x86_64-unknown-linux-gnu) Copyright (C) 1995-2016 Joerg Schilling
TOC Type: 1 = CD-ROM
Using libscg version 'schily-0.9'.
Driveropts: 'burnfree'
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   : 
Vendor_info    : 'ASUS    '
Identifikation : 'SDRW-08D2S-U    '
Revision       : 'BA01'
Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM.
Current: DVD+R/DL
Profile: DVD+R/DL (current)
Profile: DVD+R 
Profile: DVD+RW 
Profile: DVD-R/DL layer jump recording 
Profile: DVD-R/DL sequential recording 
Profile: DVD-RW sequential recording 
Profile: DVD-RW restricted overwrite 
Profile: DVD-R sequential recording 
Profile: DVD-ROM 
Profile: CD-RW 
Profile: CD-R 
Profile: CD-ROM 
Using generic SCSI-3/mmc-3 DVD+R driver (mmc_dvdplusr).
Driver flags   : NO-CD DVD MMC-3 SWABAUDIO BURNFREE FORCESPEED 
Supported modes: PACKET SAO LAYER_JUMP
Drive buf size : 393216 = 384 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data  2147 MB        
Total size:     2147 MB = 1099440 sectors
Current Secsize: 2048
Blocks total: 4173824 Blocks current: 4173824 Blocks remaining: 3074384
Reducing transfer size from 64512 to 32768 bytes.
Forcespeed is OFF.
Starting to write CD/DVD/BD at speed 6 in real SAO mode for single session.
Last chance to quit, starting real write in 3 seconds.
   2 seconds.
   1 seconds.
   0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... cdrecord: Layer 0 size 2086912 is bigger than expected disk size 1099440.
cdrecord: Use single layer medium.
cdrecord: Cannot open next track.
input buffer ready.
Writing  time:    0.020s (00:00:00.020)
Average write speed 999,0x.
Fixating...
cdrecord: Eingabe-/Ausgabefehler. close track/session: scsi sendcmd: no error
CDB:  5B 01 06 00 00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 30 06 00 00
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x30 Qual 0x06 (cannot format medium - incompatible medium) Fru 0x0
Sense flags: Blk 0 (not valid) 
cmd finished after 0.004s timeout 1000s
cdrecord: Eingabe-/Ausgabefehler. close track/session: scsi sendcmd: no error
CDB:  5B 01 06 00 00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 30 06 00 00
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x30 Qual 0x06 (cannot format medium - incompatible medium) Fru 0x0
Sense flags: Blk 0 (not valid) 
cmd finished after 0.004s timeout 1000s
=== last message repeated 2 times. ===
Trouble closing the last session
Fixating time:    0.018s (00:00:00.018)
cdrecord: fifo had 128 puts and 0 gets.
cdrecord: fifo was 0 times empty and 0 times full, min fill was 100%.
BURN-Free was not used.

cdrecord command:
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/usr/bin/cdrecord -v gracetime=2 dev=/dev/sr0 speed=6 -sao driveropts=burnfree -data -tsize=1099440s -