Why forum entries truncate at beginning

I created a Conference room this morning at 8:30am. 15 people participated in a virtual meeting until 9:30am. At 11am, the first hour was missing from the dialog.

Why?

Using Openfile version 3.5.3, Spark 2.5.8

Found a setting in the group conversation setup where the number of lines retained was set too small.

This is not a bug.