ObjectDisposedException: Cannot access a disposed object. Object name: 'DataFlowConnectionPool'

After failing to bootstrap a MemcachedBucket by trying to bootstrap it as a CouchbaseBucket (see NCBC-2509), subsequent attempts cause ObjectDisposedException.

1. Create a cluster with travel-sample and add a memcached bucket named 'membucket'.

2. Read an Airline from travel-sample, then try to write that back to membucket.

I've attached a repro ASP.NET Core project. Build it against 3.0.1, change startup.cs to point at your couchbase intance, then hit https://localhost:44329/api/airline/10. The first time will give you a DocumentNotFound exception. All subsequent requests will cause ObjectDisposedException.