Hit ENTER after each Tag to add it to your post; Numbers in parentheses represent the Tag's usage.
This has already happened to me more than a couple times on this new community...
I type a thorough lengthy response to something and then accidentally hit the back button. Everything I typed is lost, and usually this frustration is enough for me to skip responding entirely.
Please have the editor box work like most other forums, where it will save and remember the draft.