Q2698 Sleep mode problem


I use the Modem Q2698 with the Firmware version 7.50_A2 and I have follow problem:
I can´t enter the sleep mode when I send the AT+W32K=1 command and switched the DTR-Pin to Low.
The USB and UART2 are disabled.
The current power is about 54mA.
On the equal board I use the Q2687 Modem and to enter in sleep mode is no problem.
Have I forgotten a new adjustment?

best regards

Talk to your FAE about this to get it reported to Sierra through other means.
It’s the same in SL808xT with 7.50_A1.