Qubes Clipboard Size Limit 63 KiB?

When copying text to the Qubes clipboard (Ctrl+C & Ctrl+Shift+C) it stops working after 63.0 KiB of data. Has anyone else had this issue? As soon as I highlight more than this amount of text (around 18 pages), it only copies 1 byte to the clipboad. What is this one byte you might ask? Bizarrely, ‘ÿ’.

All of my Qubes are up to date, this is from Debian 10. It’s not a serious issue as I can continue to copy+paste in sections, but wonder if it is resolvable, and couldn’t find the issue elsewhere on the forum, or the internet more broadly. Thanks!