Thank-you for the suggestions Emranemranx.
I do use the latest software versions on everything and Customizr’s child theme.
As far as the plugins go, I deactivated all of them and tested the site without. Problem was still there so, reactivated one by ones and tested again each time. They are not the problem.
Clearing my browser’s cache/history is SOP with me. That’s not the problem. RE: Javascript, I took out everything. Didn’t do anything and I didn’t see any code that could break my site.
RE: different browsers, I have to make sure my site works with all of the most popular browsers so…
Like I said, in my previous post on this, only solution I found so far is to disable the sticky header. Not the perfect solution but, at the end of the day, I can live with it.
Cheers,
Marc
System’s information
### Begin System Infos (Generated 2019-04-30 13:30:46) ###
———— SITE INFO
Site URL: https://www.datatelcom.com
Home URL: https://www.datatelcom.com
Multisite: No
———— USER BROWSER
Platform: Windows
Browser Name: Firefox
Browser Version: 66.0
———— WORDPRESS CONFIG
WP Version: 5.1.1
Language: en_CA
Permalink Structure: /%postname%/
Active Theme: Customizr Child 1.0.0
Parent Theme: Customizr 4.1.38
Show On Front: page
Page On Front: Home (#2117)
Page For Posts: BLOG (#3287)
ABSPATH: /nfsvol-b/43/51943/datatelcom.com/nic_wordpress/
WP_DEBUG: Disabled
WP Memory Limit: 40MB
———— NIMBLE CONFIGURATION
Version: 1.7.1
Upgraded From: 1.7.0
Started With: 1.1.9
———— WP ACTIVE PLUGINS
Broken Link Checker: 1.11.8
Google Fonts for WordPress: 1.6.3
Gutenberg: 5.5.0
Nimble Page Builder: 1.7.1
Polylang: 2.5.3
TinyMCE Advanced: 5.1.0
VFB Pro: 3.3.9
WP Fastest Cache: 0.8.9.2
Yoast SEO Premium: 11.0
———— WP INACTIVE PLUGINS
Disable Gutenberg: 1.8.1
Regenerate Thumbnails: 3.1.0
Smush: 3.2.0.1
Title Remover: 1.2
VFB Pro – Form Designer: 2.0.5
Wordfence Security: 7.2.5
———— WEBSERVER CONFIG
PHP Version: 7.2.8
MySQL Version: 5.1.66
Webserver Info: Apache/2.4.33 (Amazon)
Writing Permissions: OK
———— PHP CONFIG
Memory Limit: 256M
Upload Max Size: 2M
Post Max Size: 8M
Upload Max Filesize: 2M
Time Limit: 30
Max Input Vars: 1000
Display Errors: N/A
PHP Arg Separator: &
PHP Allow URL File Open: 1
### End System Infos ###