Share-sheet glitches on iOS?

Has anyone else run into periodic share-sheet glitches on iOS, primarily in Safari?

It usually shows nothing in the horizontal second row (where apps normally appear) – just some fuzzy, unrendered blurs – and some or many of the individual actions in the vertical list are also blank (just white space between lines).

It’s hard to reproduce, and usually fixes itself if I wait a while and/or reload the page. I thought it was related to invoking the share sheet before the page had fully loaded, but sometimes it occurs even when the page appears to be complete.