Mystery cache non-invalidation

[hampelm]

I loaded a survey, zoomed to an address where responses had been recently deleted, and zoomed in / out. I got 3 different tiles at 3 different zooms. I reloaded the page in case the responses had just been deleted and it happened again. I cleared the S3 cache for the survey and got the expected empty tiles. I was not able to reproduce using a test survey, but wanted to note it.

[hampelm]

(The address search was for 6587 Hamilton ave in lots-to-love)

[prashtx]

Were the entries deleted through the API or by manually removing the documents from the database? I don't see any "zombie" response docs for the lots-to-love survey, so the tileserver won't realize there has been a deletion and will consider the cache valid (as will the stats code).

[hampelm]

I didn't do any of the deleting yesterday. Maybe they were deleted in an earlier cleanup.