Javascript error when clicking on kml zone, not each time

Hi,

I got a Javascript error when I click on a KML zone but not each time:
“b.descriptoin is undefined”
plugins/wp-flexible-maps/js/flexible-map.js?ver=1.9.2

When this error comes, the info bullet is hidden.
If not, the bullet appears.

WordPress v4.3 and plugins:
– Advanced Code Editor 2.2.6
– Akismet 3.1.3
– Events Made Easy 1.5.41
– Events Made Easy & qTranslate-X 1.0
– Flexible Map 1.9.2 (of course)
– qTranslate slug 1.1.17
– qTranslate-X 3.4.3
– Recent Posts Slider Responsive 1.0.1
– Responsive Lightbox 1.3.2
– Shortcodes Ultimate 4.9.8
– WP SIMILE Timeline 0.4.9

Cheers.

https://ww.wp.xz.cn/plugins/wp-flexible-map/