Why is the graph incorrect in Zabbix 5?

Question

Zabbix

There was a need for pie charts and then a problem surfaced. Two components of the graph, which are 100%, but there is a third component. Where is she from?

Here is the data for the investigation:
Zabbix 5.0.5

Here I also changed the type of element No. 2 to summary. No changes

Here is the graph itself


This is a special case, for the most part the graph is built correctly (95% of cases).

There is also a second question. I upgraded the graph, most likely wrong, but here's what happened:

Here's what happened:


Do I understand correctly that the third element is under the first two? That is, a graph of 200%?