The indexer only record the inscription inscribed on the first input. In my case, I was using batch inscriptions to create multiple inscriptions in one transaction, but only the first inscription was recorded in indexer.

Here is my transaction on testnet:
https://mempool.space/testnet/tx/40c71f4ed13b4587ba3831069edaa69e639e2b7d4ec5ec7ddc22a876c0d478e2

Here is the transaction on your explorer:
https://testnet.explorer.sado.space/tx/40c71f4ed13b4587ba3831069edaa69e639e2b7d4ec5ec7ddc22a876c0d478e2

You can also check the inscription information on this link:
https://testnet.ordinals.com/inscription/40c71f4ed13b4587ba3831069edaa69e639e2b7d4ec5ec7ddc22a876c0d478e2i19