Why are most of my tags deleted whenever I make a post?

I've notice that most of my tags that I make are deleted or gone. I usually add in the tags because I think it's a good idea to have it tagged so if others are going through a problem or looking for the same solution as me, it will be very easy to find when you search for the precise word besides just trying to scheme through topic posts. Just really what to know why that is.

The tags you’re using all start with a hash #, this is not needed. It’s a bug allowing that character!

They won’t be removed if you omit the hash.

Oh wow. Okay, thanks for your answer and replying back.

If you click on a tag it will show you all content tagged the same