I have tried Vanity search with range specified and it has found address that is out of range:
./keyhunt -m vanity -f tests/van.txt -l compress -R -b 66 -e -s 10 -q -t 32 -n 0x400000000000
[+] Version 0.2.230519 Satoshi Quest, developed by AlbertoBSD
[+] Mode vanity
[+] Search compress only
[+] Random mode
[+] Endomorphism enabled
[+] Stats output every 10 seconds
[+] Quiet thread output
[+] Threads : 32
[+] N = 0x400000000000
[+] Bit Range 66
[+] -- from : 0x20000000000000000
[+] -- to : 0x40000000000000000
[+] Bloom filter for 1 elements.
[+] Loading data to the bloomfilter total: 0.03 MB
[+] Total 488007616512 keys in 3320 seconds: ~146 Mkeys/s (146990245 keys/s)
Vanity Private Key: 164ddd867ec35f2e98f582c4d0d737f56f10d6a3cd2be340adf436912436f49
pubkey: 03cb9c45ef630131d33cf1e0b062165cea96a2cc3daf89448063180f48ad11d7ce
Address 13zb1hQbAP3nYzCWptx59aR1qG7J4UCY6h
rmd160 20d45a6a75b7519bfed7f99e576f1acd0aad1428
[+] Total 896877281280 keys in 6110 seconds: ~146 Mkeys/s (146788425 keys/s)