Issue: [4.1.2] Edited page changes are lost if BB code is toggled (code view) and unsaved changes are previewed

Changes to a pages contents appear to be lost if the page is edited in code view mode (Toggle BB code) and the page is previewed.

The first preview shows the drafted changes, however further previews lose any unsaved changes and instead shows a preview based on the public page. Saving the edited page at this point will result in all changes to the page content being lost. This does not appear to affect additional fields like meta description and edit description. Not previewing an edited page or previewing a maximum of one time seems to avoid this data loss problem.

If a new page is wholly edited in code view and previewed, then the page is created with no page contents (placeholder stub text is displayed instead). This also triggers a javascript error when previewing more than once (core-compiled.js: Was not provided an object or HTML content).

TL;DR:

• Edit page in code view = No data loss.
• Edit page in code view with 1 preview = Preview appears OK, saved page data loss.
• Edit page in code view with >1 preview = All but first preview not as expected, saved page data loss.

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Additionally, while attempting to reproduce this problem, a newly checked parseurl checkbox field reverts to unchecked when the same page is reopened for further editing. This test was repeated for creating a brand new page and the same reset to unchecked same behaviour was witnessed.