Wrong forum thread order

[qubodup]

As one example, https://freesound.org/forum/freesound-project/ has https://freesound.org/forum/freesound-project/44563/ as the top non-pinned thread. The last reply on that thread was "2 months, 2 weeks ago".

Perhaps this is caused by a spam post that got removed or a post deleted by their author (untested).

In addition, this is the only thread in that subforum without a "latest reply":

Other affected subforums:
"Legal" help and Attribution questions:

Bug Reports, Errors and Feature Requests:

Sample Requests:

Dare the Community:

Off Topic:

[qubodup]

Untested speculation: the last post date is set by new thread posts but if these posts are deleted by the user or by a moderator, this makes the date invalid. The sorting then treats no date as priority positions over actual dates.