All mqtt items go missing from groups

It’s a week old installation on raspberry pi

Had a few mqtt items added via paper UI in two groups lounge and garden

Added a new item in dining the group appeared but no switch under control

Looked in the other groups and nothing there

Things and channels are still present tried deleting and re add says linked but still not appearing

Will probably reload but worried how would I have restored if had 100s of devices

Where are you looking, is this a sitemap based UI ?

its was under control in paper UI all the switches and my sensors had gone

ive done a scratch install and the switches are now back in inc the new one

mysensors is on another device so nothing lost there

belt and braces have taken the sd card out and done a back up using dd this time