I'm using zabbix sender (via official python zabbix tools). Before 7.0, I sent a large text (stdout of Ansible with some extras) that includes newlines, and in the history widget I could see without issue.
After the upgrade to 7.0, the history widget doesn't show the newlines (it ignores them), at the text is like broken. Though if you go to "latest data" tab, you can see it correctly.

Same case happened while gathering data from Kubernetes API (http agent).

I tried using "as is" "html" and "monospace" font. Before 7.0 using "as is" worked well.{}

For now I'm using "single line", then click on the line to show a popup with the full text.
Example: