Design split into two

I had a update when i opened up the program and afterwards a design i have been working on with two main pieces to the part was separated into two separate designs. No longer in the same design space so i cannot work simultaneously on the whole design without exiting one design space and opening the other as two separate projects. Has anyone experienced this issue?

Never heard of this before, can you show us screenshots?

Can you not export one of the designs into Shapr format and import it back into the other one?

Thanks. Exporting one of the two as a shaper project and importing it to the correct project works fine but id love to know if I inadvertently caused the issue or was it a random glitch in the software. Its never happened before, if I can avoid this in the future I’d like to know lol.