some of my users appear in SM04 with lots of pending HTTPS sessions with "R=3 P=/sap/bc/ui2/start_up" (Application info.). They are using FLP
it can be several weeks old.
I can't reproduce this issue by myself.
environment : S/4HANA 1809 FPS01, SAPUI5 1.60.11, SAP_UI 753SP02
thanks for your help.