Users reported that the Tenor GIF search in the composer fails to load more GIFs when scrolling, affecting both desktop and mobile. The issue was confirmed across multiple platforms, including Meta and a forum using GIPHY. A fix was proposed in a pull request (#105), which resolved the problem for some users. Further improvements were made to address extra scrollbars on desktop, with a second fix (#106) released. The team acknowledged the issue and provided updates, with a resolution now in progress.
I have noticed the same here on Meta (I think Tenor is used here too) and on my forum which currently uses GIPHY. Loading more GIFs on scroll seems to be broken.