Duplicate translations macros are created when saving a page with autosaved draft

Prerequisites:

• Confluence with collaborative mode off

• Space with two languages: German (default), English

Steps to reproduce:

1. Create a new page template in space’s Content Tools using the storage format attached to this issue (internal attachment),

2. click Create → select the template from step #1,

3. add an image to German language macro,

4. wait until you see a message that the draft autosaved,

5. add a title → click Save.

Expected result:
The content is saved, the page is displayed after saving

Actual result:

• The page has two German language macros,

• Error is displayed: Error: [com.ctc.wstx.exc.WstxLazyException] Unexpected close tag ; expected . at [row,col {unknown-source}]: [1,1926]