https://github.com/bugaevc/wl-clipboard/issues/268
It seems that a patch has been committed: https://github.com/bugaevc/wl-clipboard/commit/091d6028b5c9db75ad36f9fceb0db3ee718045fa ... but no tagged releases in a long time.
Are you using KDE/Plasma? I can reproduce that on Debian unstable with a
KDE desktop. The related upstream bug is probably this one:
