Filters/Export does not include all observations requested

Platform: Website

App version number, if a mobile app issue:

Browser, if a website issue: Chrome

URLs (aka web addresses) of any relevant observations or pages:
Excluded from result: https://www.inaturalist.org/observations/289903982
Included in result: https://www.inaturalist.org/observations/289898801

Screenshots of what you are seeing:

Description of problem:

PROBLEM

I use an observation field to identify “Cave” observations.
Field name: “Habitat (s Afr)”
Field Value: “Caves”

I use the Filter button to download my cave observations.
PROBLEM: Not all observations are included in the extract.

Step 1:
On an observation, select the Observation field “Habitat (s Afr)” , value “Caves”

Step 2:
Goto [Your Observations]
https://www.inaturalist.org/observations?place_id=any&user_id=peterswart&verifiable=any

Step 3:
Click on [Filters] button

Step 4:
Type “Caves” in the “Description/Tags” field.

Step 5:
Click [Update Search]

Step 6:
Result: Of my last 7 qualifying observations, only 1 is returned:
Returned correctly:
https://www.inaturalist.org/observations/289898801

Not returned:
https://www.inaturalist.org/observations/289903982
https://www.inaturalist.org/observations/289903351
https://www.inaturalist.org/observations/289902714
https://www.inaturalist.org/observations/289901257
https://www.inaturalist.org/observations/289900296

why are you doing this in addition to your step 1?

compare:

and: