Steps to reproduce:
1. Create a Landing page
2. Add Text block (or any block with richtext)
3. Select twitter/youtube or facebook tag from richtext toolbar
4. Create tag with some values
5. Edit the tag again and make some changes to attributes
6. Save changes
7. Edit the tag again

Actual result:
Attributes preview shows wrong values (seems it not being updated)

Expected result:
Attributes preview shows proper values

Please be aware that attributes values after edition are ok.