Bluetooth weirdness

It’s worked brilliantly for 6 months, two phones connected, Spotify through Bluetooth on my personal phone.

Today, both phones stopped working through the handsfree speaker. Unpaired, re paired, check settings, no iPhone updates, Spotify still works but when I phone out it defaults to the phone handset although everything comes up like it’s going to work fine. When I press for it to come through the Skoda system.....nowt, nada, zilch.

Any one else suffering or do at need to Fonz it by punching the screen?

It’s the Columbus system if that helps.