Dsd Isolation Switch No Longer Operational - Class 47 Blackpool Branches?

Not sure if this is a bug or intentional, but the DSD isolation switch on all Blackpool Branches Class 47 locomotives (Back of the cab above the driver's door) is now not working.

It still works fine on the NTP class 47.

Seems to have happened after today's TSW suspension patch.

 

Matt in the suspension feedback thread.

 

Thanks for the update.

I'd only seen the news update on Steam up until now so wasn't aware it had been covered elsewhere.