Encryption.php logging errors with files_primary_s3 configuration even though I do not and have not ever had encryption turned on

[posita]

I keep seeing errors in owncloud.log like this:

{"reqId":"…","level":3,"time":"2022-05-16T08:28:20+00:00","remoteAddr":"…","user":"<username>","app":"PHP","method":"GET","url":"\/remote.php\/dav\/files\/<username>\/<path>","message":"fread() expects parameter 1 to be resource, bool given at \/…\/lib\/private\/Files\/Storage\/Wrapper\/Encryption.php#927"}
{"reqId":"…","level":3,"time":"2022-05-16T08:28:20+00:00","remoteAddr":"…","user":"<username>","app":"PHP","method":"GET","url":"\/remote.php\/dav\/files\/<username>\/<path>","message":"fclose() expects parameter 1 to be resource, bool given at \/…\/lib\/private\/Files\/Storage\/Wrapper\/Encryption.php#928"}

I have had files_primary_s3 configured for storage since before this user was created. I have never had encryption turned on. I am nervous about this because I have had an entire installation obliterated by encryption interacting with files_primary_s3 before it was identified as an incompatible feature.

I don't know whether this should be part of owncloud/encryption, owncloud/files_primary_s3, or owncloud/core.