Reusable blocks not available

Hi,

I have a site loaded with re-usable blocks and they are all working except a button block.

I can’t recreate it as there is no option to access re-usable blocks from the editor….however, if I deactivate Stackable – I can then save a block as a re-usable block….trouble is most of my re-usable blocks are Stackable blocks!

What next?