Instead all blueprints are moved to the trash slots.
Removing mod fixes this issue. Altho, V2.6 seems to work ok.
Also, with V2.7, I somehow made an empty blueprint except with the title visible. I can not clear or open this blueprint. Factorio says it is already empty.
However I can't reproduce the other bug, everything works fine for me. Please send me your savefile with the mods you used, then I'll have another look at it. (You can PM it to me on the forums, username: 321freddy)