Control-y (yank) in GHCI acts like Control-z (suspend) on Mac

Summary

Control-y (yank) in GHCI acts like Control-z (suspend) on Mac, exiting to the shell.

Steps to reproduce

~$ ghci
GHCi, version 8.10.7: https://www.haskell.org/ghc/  :? for help
Loaded package environment from /Users/simon/.ghc/aarch64-darwin-8.10.7/environments/default
Prelude>
<press Control-y>
[1]+  Stopped                 ghci
~$

Expected behavior

It should do nothing (or if I had previously "killed" some text with Control-k, it should paste that text). It should not suspend the process. Ie, it should do the normal readline yank operation, as it does at a shell prompt.

Environment

Tested with GHC 8.10.7, 9.0.2 and 9.2.1 in Terminal and iTerm2 on Mac OS 12.1 (but I have been seeing this forever). It does not happen on Linux.