Lightstreamer Server v. 4.0.3 build 1513.1.11 contains some fixes that solve potential issues with polling mode.
In particular, with previous versions (from 4.0 to 4.0.2) under some circumstances, polling cycles might be more frequent than needed or return less updates than requested.
Most of the Adapter APIs and Client APIs have been updated as well, with minor fixes.
The iOS Client API has been updated to version 1.1, with several bug fixes impacting the smart handling of poor connectivity cases.
We recommend you to read through the detailed changelog for full details.