Link to personal campaign site lost when contribution is edited

we are using Joomla 3.3 and the latest civicrm version. We would like to use the personal campaign pages for charity-runs. Unfortunately when I am making a contribution to the pcp-site everything is working well and a new contribution is added with the status "pending" (because of the pay later option).

When I now set the status to "completed" in the civicrm-backend the "link" to the pcp-site is gone. The campaign-site is showing the contribution - but not the related pcp.
It seems as if the information is lost upon the status-change!

I was able to replicate the same issue on the demo-site! In my opinion it is definitely a bug.
If someone edits (not changing anything, just clicking the link "edit" and "save" afterwards) a contribution linked to a pcp the link to that pcp got lost. And with it all notes from the donor to the honor-wall.

That issue is kind of annoying, because it is not unlikely that someone edits a new contribution and deletes the link to the pcp without knowing...

If you would like to check it on the demo-site yourself just do the following steps:

1) add a contribution to a contact with "pending state" AND link it to a pcp
2) Search for contributions with "pending" state with the search-feature
3) Mark the contribution and select "change contribution state" and then change the status to "completed"
4) Check to fronted of the pcp - the contribution you added should be shown in the honor-roll
5) Now go to the contact and "edit" the contribution (clicking on "edit") and just close the view by clicking on "save" without making any changes
6) Now check the pcp again - the contribution is not displayed anymore