Describe the bug
We are unable to select a field to filter on from our data warehouse when selecting a field filter.

Logs
Please include javascript console and server logs around the time this bug occurred. For information about how to get these, consult our bug troubleshooting guide

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Variables' in a Question.
2. Create a Field Filter Variable type.
3. Click on the drop-down to select a field to map to.
4. You can filter on schemas, but can never see the table details. The spinning continues to spin for many minutes. I have waiting >10 minutes a few times.

Expected behavior
When I select a schema and table, I expect to be able to see a list of fields to select.

Screenshots
If applicable, add screenshots to help explain your problem.

Severity
How severe an issue is this bug to you? Is this annoying, blocking some users, blocking an upgrade or blocking your usage of Metabase entirely?
Note: the more honest and specific you are here the more we will take you seriously.
This is very uncomfortable because we do not know a current workaround, which makes it impossible to create new dashboards, or to edit existing filters.

Additional context
We recently upgraded to 1.48.5 on 2023-02-08, which is when this problem first occurred. We assumed that the indexing would have completed much faster than this.

Metabase Diagnostic Info

{
  "browser-info": {
    "language": "en-US",
    "platform": "MacIntel",
    "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36",
    "vendor": "Google Inc."
  },
  "system-info": {
    "file.encoding": "UTF-8",
    "java.runtime.name": "OpenJDK Runtime Environment",
    "java.runtime.version": "17.0.10+7-LTS",
    "java.vendor": "Amazon.com Inc.",
    "java.vendor.url": "https://aws.amazon.com/corretto/",
    "java.version": "17.0.10",
    "java.vm.name": "OpenJDK 64-Bit Server VM",
    "java.vm.version": "17.0.10+7-LTS",
    "os.name": "Linux",
    "os.version": "4.14.334-252.552.amzn2.x86_64",
    "user.language": "en",
    "user.timezone": "UTC"
  },
  "metabase-info": {
    "databases": [
      "redshift",
      "postgres"
    ],
    "hosting-env": "unknown",
    "application-database": "postgres",
    "application-database-details": {
      "database": {
        "name": "PostgreSQL",
        "version": "13.10"
      },
      "jdbc-driver": {
        "name": "PostgreSQL JDBC Driver",
        "version": "42.6.0"
      }
    },
    "run-mode": "prod",
    "version": {
      "date": "2024-02-06",
      "tag": "v1.48.5",
      "hash": "dab12cf"
    },
    "settings": {
      "report-timezone": null
    }
  }
}```