[Resolved] Double output in the wysiwyg editor the_content ?

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[holgerW-2]

I have already tried several plugins to display a picture source as an overlay in the picture. All plugins show problem with a custom post type built-in wysiwyg editor field. With the featured image and in the standard posts, everything works perfectly. Errors only appear when I embed an image in the custom post type built-in editor field.
I spoke to the support of the Image Source Plugin and I would like to ask you to take a look at their answer:

"I suspect that the "the_content" filter of WordPress runs twice here. Once over the actual content and once over the content field. This is perhaps similar to https://toolset.com/forums/topic/wp-content- function-being-called-twice-on-page/.

If you don't use shortcodes, please ask Toolset Support for advice. I don't see a way to fix it directly in ISC without risking functionality on other sites."

Can you help?

Error appears here in the middle of the text, the picture shows the source twice:
hidden link

[Waqar Supporter Languages: English (English ) Timezone: Asia/Karachi (GMT+05:00)]

Hi,

Thank you for contacting us and I'd be happy to assist.

In the 'Single Field' block settings, there is a setting named 'THIRD PARTY FILTERS'. Selecting the option 'Do not apply third party filters to the output' fixes this double processing through the "the_content" filter.
( screenshot: hidden link )

I've changed the option and the overlay text is showing only once now.
( screenshot: hidden link )

regards,
Waqar

[holgerW-2]

My issue is resolved now. Thank you!