After update from ThinOS 8.6_606 to 9.1.1131 the USB to Serial Redirection to Citrix Xenapp Session not work. Also the redirection from the Serial Port not work. The Device is configured over WWMS 3.1.1. USB redirection is active and Printer, Audio and Video are excluded. Map Serials is active.
Also a USB Stick are not mapped to the Citrix Session since the Update. Perhaps the same issue solved this Problem too. Map Disks is here also active