Steps to reproduce:

1. Create a Host to monitor (The Host has Agent2 running with the right pemissoin)
2. wait a bit so dada is comming.
3. Navigate to screen title latest data
4. Click on screen down on <1 2. ...... >
5. after a view pages i got the Error like
   date() expects parameter 2 to be int, string given [zabbix.php:22 → require_once() → ZBase->run() → ZBase->processRequest() → ZBase->processResponseFinal() → CView->getOutput() → include() → CPartial->getOutput() → include() → formatHistoryValue() → convertUnits() → zbx_date2str() → date() in include/func.inc.php:253]

Result:
Looks like some thing is not consistant. i Don't know what. But it looks like the date funktion expect an integer an got string.

So is the problem the Agent2 or the Docker Template.