Possible Bug in WebUI - Hostview - "Alert Stats"

In host view, tab “Alert Stats”, when You drag the graph to the left and the right, the x-axis doesn’t move correspondingly. It sticks to the date range it was initially loaded with.

Firefox 60.2.0esr (64-Bit)
Chromium Version 69.0.3497.81 (openSUSE Build) (64-Bit)
openSuSE Leap (15.0)

Chrome Version 69.0.3497.81 (Offizieller Build) (64-Bit)
macOS 10.13.6

Version 1.43-40-gaf7539ff3 - Mon Sep 10 2018 16:16:32 GMT+0200
DB Schema #265
Web Server Apache
PHP 7.0.31
MySQL 10.0.35-MariaDB
RRDtool 1.4.7