update readme

README.md

@@ -334,7 +334,12 @@ Additionally your frontend can
 - determine which types of text format (node) appear on the quanta toolbar when editing rich text, including adding custom formats ([TODO](https://github.com/collective/volto-hydra/issues/109))
 - add a callback of ```onBlockFieldChange``` to rerender just the editable fields more quickly while editing (TODO)
 
-Note Hydra.js knows about the schema of your blocks and based on the field name will determine what what to make your html editable.
+Note Hydra.js knows about the schema of your blocks and based on the field name will determine what to make your html editable.
+
+Currently, Hydra.js supports BOLD, ITALIC & STRIKETHROUGH formats on slate blocks and following are the conditions when it breaks slate:
+- if you select the whole text and change its formats your frontend might throw slate error saying `Cannot get the leaf node at path [0,0] because it refers to a non-leaf node: ` but it is due to proper syncing of json b/w hydrajs & adminUI.
+- if you select text at the end of the line samething will happen.
+- pressing ENTER is not implemented so, pressing it will have abnormal changes & error ([TODO](https://github.com/collective/volto-hydra/issues/33))
 
 #### Inline media uploading ([TODO](https://github.com/collective/volto-hydra/issues/36))