The recently added xxx_thai_520_w2 collations return a wrong implicit weights on the secondary level.
Notice, the character 0xF001 is not in DUCET, it's weight is generated algorithmically.
It's primary weight is correctly calculated as FBC1F001.
It's secondary weight must be 0020.
The expected result must be: FBC1F0010020
The secondary weight is calculated as FBC1F001 rather than 0020.