Thumbnails slider flex theme disappear

Topic summary

A Shopify store owner using the Flex theme is experiencing an issue where product thumbnail sliders are disappearing or appearing transparent on certain pages, despite having the correct settings enabled in the theme customization panel.

Key Details:

  • The thumbnail slider checkbox is properly checked in theme settings
  • Problem persists across multiple browsers (Firefox, Chrome) and after clearing cache
  • Issue occurs only on specific pages, not site-wide
  • When thumbnails appear, they seem to be transparent or invisible, though clickable
  • Affects both collection and product pages

Current Status:
The user has shared their store link for troubleshooting assistance. The discussion remains open with no resolution yet provided. This appears to be a theme-specific display bug requiring further investigation of the Flex theme’s CSS or JavaScript configuration.

Summarized with AI on November 5. AI used: claude-sonnet-4-5-20250929.

Good Morning , i got a problem , and im not able to understand why i got this problem i try to clear cache and also with others browser like Firefox, chrome ecc but im stuck

i checked the box

if i put left on main page it is but is like “trasparent” but i can click on it

this problem is for some reason only in certain pages.

for example here it works

if someone has an idea, it can be helpful for me

thank you

Hi Sangeetanahar

this is the link:

https://admin.shopify.com/store/sino-swiss/themes/143628992767/editor?previewPath=%2Fcollections%2Fstahlschranke%2Fproducts%2Ftest-stahlschranke&category=gid%3A%2F%2Fshopify%2FOnlineStoreThemeSettingsCategory%2FElements%3Ftheme_id%3D143628992767%26first_setting_id%3Dicon&section=template–18144403259647__main

thx

sorry

here

https://sino-swiss.ch/collections/stahlschranke