Custom Caching Filesystem does not work with a url string

I am creating a custom redis caching filesystem and I found that opening a file with a custom string does not work because of this hardcoded sequence https://github.com/fsspec/filesystem_spec/blob/0bb3f26c412d7ad9b2d52a5c32265014709d1c1f/fsspec/core.py#L352 :

        bit = cls._strip_protocol(bit)
        if (
            protocol in {"blockcache", "filecache", "simplecache"}
            and "target_protocol" not in kw
        ):
            bit = previous_bit
        out.append((bit, protocol, kw))
        previous_bit = bit

Is there a way to work through this without forking fsspec? I am have registered my class and am trying to open like this:

import fsspec
from redis_fsspec_cache.sync import RedisCachingFileSystem

fsspec.register_implementation("rediscache", RedisCachingFileSystem)

with fsspec.open(
    "rediscache::s3://nextgen-dmac-cloud-ingest/nos/ngofs2/nos.ngofs2.fields.best.nc.zarr",
    mode="r",
    s3={"anon": True},
    rediscache={"redis_port": 6380},
) as f:
    print(len(f.read()))

Opening through the filesystem works fine. Thank you for any help you can give!

Start in fsspec/core.py at the linked protocol-parsing sequence and reproduce the provided rediscache::s3://... call using the registration and keyword arguments shown. Compare it with direct filesystem access; done means the custom caching filesystem can open the URL string successfully without forking fsspec.