Using blockfrost I have pulled a list of addresses of owners of a specific fungible token. Some of the addresses are significantly smaller than the others (about 2/3 the length).
When querying blockfrost for stake keys (or pool.pm) with those addresses i get an error 504 after a long timeout, while all the others work smoothly.
An example of the syntax and function used with python is the following
Here is the address causing me trouble
How should I handle those, what are they?