Why does `read` stop the function?

Question

If I define a bash function like this

test1 () {
 (
 touch /tmp/test1
 rm /tmp/test1
 read -rp "Enter anything: " anything
 echo "Anything: ${anything}"
 )
}

and set this option and trap

trap 'echo trapped' DEBUG;
shopt -s extdebug

and then execute it from an interactive bash session the read statement stops the job.

$ test1 () {
 (
 touch /tmp/test1
 rm /tmp/test1
 read -rp "Enter anything: " anything
 echo "Anything: ${anything}"
 )
}
$ test1
Enter anything:
[1]+ Stopped ( touch /tmp/test1; rm /tmp/test1; read -p "Enter anything: " anything; echo "Anything: ${anything}" )
$ fg 1
( touch /tmp/test1; rm /tmp/test1; read -p "Enter anything: " anything; echo "Anything: ${anything}" )
something
Anything: something

If I only have one command before the read then the function executes as expected.

This is a minimum example to reproduce the issue. I have work arounds but I'm trying to understand this behavior. Bash version is 5.2.15(1)-release (aarch64-apple-darwin22.1.0)

• John Bollinger: I do not reproduce the issue with the code presented, though I am running it in an earlier Bash. And I don't expect Bash or a POSIX shell to run any part of that command in the background, which your output appears to show is happening.
• John Bollinger: To the extent that the code presented is sufficient for you to reproduce the issue in your Bash, I would be inclined to guess that it is related to putting all the work inside a subshell. I don't see what purpose is served by doing so in the function presented, that could not be better addressed by other means.
• Cyrus: To keep variable local use local within a function: local anything
• John Bollinger: A subshell is a pretty heavy tool for namespacing. Declaring variables local is the "other means" I had in mind for that particular objective. Subshells do provide isolation for other aspects of the execution environment, so there might still be a reasonable use case there, but it depends on what exactly you need to isolate.
• pjh: You can use local -x to create a local variable that is exported.