This reminds me of when the spacebar stopped working in the YouTube search box. I thought my keyboard broke for a sec until I realized it worked just fine everywhere but YouTube. Then later I found out it wasn't just me... https://www.theverge.com/2021/3/10/22323716/youtube-search-b...
Rather than insert a space in the search term, it scrolls the document.
The backspace key fails to work in Pocket when editing tags. Instead it's necessary to either use the key (if available), or to highlight and overwrite text to be replaced.