Hi,
Global product tabs show as empty tabs following the update to 5.5.6
I’ve tested with different PHP versions, themes and hosting.
The tab head/title shows but the tab content is missing.
If possible can you check once if there is any display:none property on the content? Because this could happen if you have copied content from somewhere else. Or you can provide us the website URL where this is not showing. We will check from our side and help you.