Hi,

For the following Twitter campaign IDs and Account ID, we see cost, impressions and clicks data from Twitter Ads API without any install data.

Account ID:6vlb50
Campaign ID:
eo6nj
eo6ly
e9u2q
e8kuv
f12o7
e0w0f
edpow
eotrq
eejoa
el5af
eynb8
e1uzk
eyoei
ezk05
es9ay
f1fd0
f1fg8
eufoo
es9vn

Also, we see a behaviour were for the same account ID 6vlb50 and campaign IDs -
eyoei
ezk05
eufoo

We see few installs from Twitter API without any associated clicks, impressions and cost from Twitter.
We see the above-mentioned behaviours in account IDs 18ce55a99do and 7foyb5 as well.
(You can check data for February from these Twitter ad accounts)

Could you please help us to understand what would cause this behaviour?

The forums are meant to help with API-specific issues. Please request support for campaign performance through Twitter Ads - Help.