internal limit to number of /xapi/v1/users returned?

[cdebbo]

I can manually export 264 users from our system. Mix of extensions and Hot-desk.

But I only get back 255 users (yes 2^8 ??) when I use the API. I try
/xapi/v1/Users => 255 ... should be 264 ....
/xapi/v1/Users?$top=100 => 100
/xapi/v1/Users?$top=100&$skip=100 => 100
/xapi/v1/Users?$top=100&$skip=200 => 55 ?? ... should be maybe 64 ...
/xapi/v1/Users?$top=100&$skip=250 => 5 ??
/xapi/v1/Users?$top=100&$skip=256 => 0 ??
/xapi/v1/Users?$top=300 => error "bad request" ... should be 264 ...

any ideas?