Agent downloading /Ldlogon/lddwnld.dll many times

Hello.

Under which circumstances would a Windows LANDesk agent v9.5 SP1 download the /Ldlogon/lddwnld.dll file from the CORE?

We are having some issues with our CORE and are therefore analyzing IIS logs. We can see that a subset of devices is performing the following action very often:

HEAD /Ldlogon/lddwnld.dll - 80 - <Device_IP> - 200 0 0 1045

We have seen examples of devices requesting the file several hundred times within a few hours even when the CORE and client are on the same LANDesk patch level.

Thanks in advance.