Question about Yamaha Yas-207

Coupling the music centre and subwoofer manually
1 Switch off the subwoofer
2 Press and hold the SUBWOOFER (-) button on the remote control for more than 3 seconds.
for more than 3 seconds.
The DPL indicator on the music centre will flash.
3 Within 30 seconds, press and hold the pairing button
button on the subwoofer rear panel for more than
than 3 seconds.
Once the music centre and subwoofer have been paired and a wireless
wireless connection has been established, the indicator will light up and the subwoofer will be ready to play.
The music centre and subwoofer will light up.

In the manual on page 42 it explains how to manually pair the subwoofer.
https://ca.yamaha.com/files...

Hi, I'm not entirely sure, but try rebinding the subwoofer.