summaryText is nil, but icon shows up in transcript 10.1, is this intended use now?

My app doesn't send messages with any summaryText, it is nil on purpose not to clutter the chat transcript because users end up with tons of these transcripts and get lost in the messages. https://pbs.twimg.com/media/Csnp1yyUEAAVtPa.jpg:large

I need to know going forward if this is going to be intended use now and even if summaryText is nil transcript icons will show up no matter? This what documentation said (If the summary text is

nil