fix(core): isolate malformed FFE flags - #363

• All required reviewers must approve this pull request before it can be merged. Learn more in our FAQ.

• Needs approval from Team: feature-flagging-and-experimentation-sdk

  _{Questions about this check? Reach out in #dx-source-code-management on Slack.
  Digest: 8402da0}

• All applicable files are owned properly
  _{Digest: 9572ebb}

if this seems incorrect, you can retrigger the evaluation of the MergeGate by clicking on this link