Sending thank you letters unlinks contributions from personal campaign pages

I searched for contributions of $100 or more since December 15th.

I checked all of these and generated thank you letters for them. I selected that the thank you dates on the contribution should be updated.

For the ones which were linked to personal campaign pages, they became unlinked such that they dropped from the totals given on the personal campaigns pages and the contributor names dropped from the honor roll.

They also do not appear in searches for contributions from the personal campaign pages.

However, when I track them down, they still list the personal campaign page in the contribution records. I have no clue why they are no longer listed on the personal campaign pages, but it did happen on all of the ones I generated thank you letters for, and only for the ones I generated thank you letters for.

If I manually edit one of the contributions and add a personal campaign page as the Source, then they will again appear on the campaign page.