This last week most of my beans (red rum and also French climbing
beans) have unwound themselves.

This is the first time I have ever seen this.

I normally start them off - by winding them round the support and
then securing, and then off they go.

I did this - no problem - but then several unwound themselves down as
far as the tie.

Anybody else experienced this?

Do other people start them off by a wind round?

How do they do if you don't do this?