Create Event popup calendar - month selection button jitter

I have setup so that my logged in user can create a calendar event from the front end.
When selecting the calendar tab and bringing the cursor close to the 'next month button' on the popup calendar the text in the lower box changes from 'Select a date' to 'Select to move to the next month. Select and hold for a list of the months. When this happens the width of the popup calendar box increases and the cursor is no longer on the 'next month button'. When the cursor is moved to get to the now moved button the lower text changes to Select a date' and the popup calendar width changes.
It presents a moving target so I won't be able to use Jevents :-(
Any ideas on a solution ?
Regards Robert

I am using a JoomlaShine EPIC2 template

PHP Version : 7.0.21

MySQL Version : 10.1.24-MariaDB-cll-lve

Server Information : Linux littlefinger.texo.co.za 2.6.32-604.16.2.lve1.3.54.el6.x86_64 #1 SMP Mon Jul 27 11:32:29 EDT 2015 x86_64

Fix jQuery? : Yes

Load JEvents Bootstrap CSS? : Yes

Max Input Vars ? : 10000

Club code set? : No  

User Agent : Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36  

Joomla : 3.7.4

component_com_jevents : 3.4.39

component_com_jce : 2.6.18

component_plg_kunena_comprofiler : 5.0.10

component_com_acymailing : 5.7.0

module_mod_acymailing : 3.7.0

module_mod_jevents_cal : 3.4.39

module_mod_jevents_custom : 3.4.39

module_mod_jevents_filter : 3.4.39

module_mod_jevents_latest : 3.4.39

module_mod_jevents_legend : 3.4.39

module_mod_jevents_switchview : 3.4.39

plugin_acymailing_calltoaction : 1.1.3

plugin_acymailing_contentplugin : 3.7.0 (not enabled)

plugin_acymailing_geolocation : 5.7.0

plugin_acymailing_managetext : 1.0.0

plugin_acymailing_online : 3.7.0

plugin_acymailing_phocadownload_j30 : 1.0.4 (not enabled)

plugin_acymailing_plginboxactions : 5.7.0

plugin_acymailing_share : 1.0.0

plugin_acymailing_stats : 3.7.0

plugin_acymailing_tablecontents : 1.0.0

plugin_acymailing_tagcontent : 3.7.0

plugin_acymailing_tagmodule : 5.7.0

plugin_acymailing_tagsubscriber : 5.7.0

plugin_acymailing_tagsubscription : 5.7.0

plugin_acymailing_tagtime : 5.7.0

plugin_acymailing_taguser : 5.7.0

plugin_acymailing_template : 5.7.0

plugin_acymailing_urltracker : 5.7.0

plugin_content_jevents : 3.4.39

plugin_editors_acyeditor : 5.7.0

plugin_finder_jevents : 3.4.39 (not enabled)

plugin_installer_jeventsinstaller : 3.4.39

plugin_kunena_comprofiler : 5.0.10 (not enabled)

plugin_search_eventsearch : 3.4.39

plugin_system_acymailingclassmail : 5.7.0 (not enabled)

plugin_system_acymailingurltracker : 5.7.0

plugin_system_gwejson : 3.4.39