I just gathered experience with the PIN of the Revolut card.
When I got my card I changed the PIN to a 6 digit PIN in a Switzerland ATM (UBS) which was accepted and reused in the same machine as 6 digit. 6 digit is common in Switzerland.
Next I travel to US, The 6 digit PIN is not recognized, it is the first four digits of my 6 digit PIN that are recognized.
Next I travel to UK, The HSBC ATM fails when I put the first 4 digits, however the 6 digit PIN is recognized.
Other folks with similar experiences?