Hi @Bazzer2 After the blue light flashes try pressing and holding the up button on the remote for 5 seconds or until the ID set message appears. once LED link is solid blue you will have a strong connection.
Troubleshooting in this guide https://downloadcenter.samsung.com/content/UM/202105/20210528191349639/HW-Q600A_ZG_FullManual_01_L04...
otherwise think would need to disconnect and go through the process of connecting the soundbar and woofer again.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .