Steps to reproduce:
1) Create Zabbix trap item with Type of information - "Text"
2) Send text data to created item.
3) Create Dashboard with widget - Top items and item pattern - item created before.
4) Set display value for item - Numeric and Display - Bar.
5) Check what displayed in widget.

Result:
We can see items Text value and bar.

Same for Indicator Display.

Expected:
No Data displayed on widget as in Top Hosts widget.