Are you only looking at TTN Console? Or do you have some actual application outside of TTN that also only gets the first few uplinks? If you don’t have such application, then I’d very much recommend using an MQTT client during debugging as well. Also, in TTN Console, the device’s “Status” might reveal if TTN actually routed the uplinks without TTN Console showing them in the Data pages.
Do you have any integration enabled? (I don’t recall if failing integrations might cause the Data page to not show the uplinks.)
Anything different in the event data when clicking the different uplinks in the gateway Traffic?
Aside: I failed to see any uplinks in the Data page at all when I started to write this answer. But the device’s Status was updated just fine, and MQTT worked just fine at that time too. Also querying the Data Integration worked as expected, though I did not see “historical data” in TTN Console’s Data page either. Meanwhile, all is fine again for me, but the Data and Traffic pages in TTN Console fail on me a lot.