This Happen in Minecraft Bedrock Realm.
well, i was playing normal, like always, then i wanted to write a sign for my home, i made it, then i place it.
and everything seems normal.
But when i finish my sign, the text i write dissapear, for some reason.
at firts, i thought it was just me, but then my friends told me, that bug happen to them too.
Steps to Reproduce:
1. Place a Sign, and write a large message.
2. It happen when you write a normal message, and you write in all the sign, if you write random letters, it doenst dissapear.
3. Some times it works normal, but if it dont, you have to delete all and start again until the text in the signs stays.
4. another thing, sometimes, theres no need to write a large message.
As You may notice, this is really annoying.
I'm not sure if this happen in single player too.