AzCopy downloads with --from-to BlobPipe fails when downloading multiple files

### Which version of the AzCopy was used?
azcopy version 10.23.0

### Which platform are you using? (ex: Windows, Mac, Linux)
Linux x86-64

### What command did you run?

``` sh
# Downloading multiple files to local dir works
$ azcopy cp "https://ACCOUNT.blob.core.windows.net/CONTAINER/*?SAS" --include-pattern="*.csv.gz" .
100.0 %, 3 Done, 0 Failed, 0 Pending, 0 Skipped, 3 Total,
...

# Downloading multiple files to pipe fails silently with exitcode 0
$ azcopy cp "https://ACCOUNT.blob.core.windows.net/CONTAINER/*?SAS" --include-pattern="*.csv.gz" --from-to BlobPipe | pv > /dev/null
0,00 B 0:00:01 [0,00 B/s]
$ azcopy cp "https://ACCOUNT.blob.core.windows.net/CONTAINER/*?SAS" --include-pattern="*.csv.gz" --from-to BlobPipe > testfiles
$ echo $?
0
$ du testfiles
0 testfiles

# Downloading single file to pipe works
$ azcopy cp "https://ACCOUNT.blob.core.windows.net/CONTAINER/data01.csv.gz?SAS" --include-pattern="*.csv.gz" --from-to BlobPipe | pv > /dev/null
345MiB 0:01:25 [4,03MiB/s]
```

### What problem was encountered?
I expect azcopy to be able to download multiple files to a BlobPipe, it does not work.

### How can we reproduce the problem in the simplest way?
Try to download multiple files from a storage account with `--from-to BlobPipe`

### Have you found a mitigation/solution?
Not yet, probably possible to do it in multiple steps, list files first and then start multiple azcopy processes..