Fixed issue with forms extracting entities from previous message

[ivanmkc]

Proposed changes: Fixes: https://github.com/RasaHQ/rasa/issues/8505

[sara-tagger]

Thanks for submitting a pull request 🚀 @yennycheung will take a look at it as soon as possible ✨

[yennycheung]

@Imod7, would you have more context for this PR? I saw you were tagged in the original issue.

[Imod7]

@yennycheung I only had a quick look at the original Issue but I can now check more in detail the issue and the current PR.

[stale[bot]]

This PR has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.