"Data-mce-..." are added to HTLM to product descprition

[Jerry00]

Hello,

In product descriptions, when I add images, a bunch of "mce-data-..." appears in the html lines. 

This causes duplicated content and extra html lines, which I assume is not good for my store.

Can you help me with that? Have you encountered this problem before?

Thank you!!

[diego_ezfy]

Hello,

This is very likely coming from some app. It's called data attribute and data attributes per se are harmless, it won't slow down your website or anything, so I wouldn't worry about it.

Kind regards,
Diego 

[Jerry00]

Hello Diego, 

Thank you for your reply.

Is there a way we can know for sure where it is coming from?

Is it normal that the html is duplicated rather than having only the data attributes? And can you tell if the data attributes are harmless in my case according to the screenshots?

Thanks again!

[Adrien63]

Hello, I have it on my store and I only have the apps Dsers and SEO King. Therefore I think it comes from SEO King