RoboHelp HTML version 9 - How can I prevent a conditional build tag from being removed from a snippet text when I edit the snippet?

I have added a Conditional build tag to a snippet text in a certain topic. However, when I edited the snippet the Conditional build tag was removed from that topic. Luckily I noticed it was missing, but know I wonder: is there anything I can do to prevent that from happening again?

Thanks in advance.