that is actually my lack of information, but it surely problem what i find out about blockchain.

I created a brand new handle p2wpkh from public key with bech32 (testnet) on ‎2022-11-10
: tb1q9ctu2t7zqvlevcamga9dfdhvlpeh93qdz6aawk
Made one transaction on 2022-11-10 10:29

pseudo code

b_pubkey = bytes.fromhex(pubkey)
h160 = hash_160(b_pubkey)
segwit_hrp = 'tb'
encoding = Encoding.BECH32 
handle = bech32_encode(encoding, segwit_hrp, [0] + convertbits(h160, 8, 5))

However in mempool it reveals it has 3 transactions, goes again to ‎2022-11-07 15:10
https://mempool.area/testnet/handle/tb1q9ctu2t7zqvlevcamga9dfdhvlpeh93qdz6aawk

aren’t addresses speculated to be distinctive and collision resistant ?