It is a credits to a photo author "IV 2.0 supports a dedicated <cite> tag for credits in media captions. Credits in captions must be preserved and placed inside the appropriate tag"
in IV description looks like one mono-field, so when we have <figcaption> and <cite> it looks like this
Type of issue
IV page is missing essential content
Reported
Feb 7, 2019
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"IV 2.0 supports a dedicated <cite> tag for credits in media captions. Credits in captions must be preserved and placed inside the appropriate tag"
https://instantview.telegram.org/checklist#6-2-5-media-credits
You can't just put credits to the start of <figcaption>