I have the same issue with IOS 122-33 SXI3 running on 6513.
RME unable to collect the inventory details eventhough updated to LMS 3.2 .
RME version : 4.3.1
Is any workaround to solve this issue on LMS 3.2
Go to RME > Devices > Device Management > RME Devices, and edit the device attributes for this switch. Do an inline edit, and increase the SNMP timeout to 10 seconds. Save the changes, then apply them on the previous screen. Inventory collection will then work.