Weird ET6000 behavior when switching on from standby(not deep)

Hello,

I have found something weird with my ET6000:

From time to time, I can see black screen with the small gears runing on the screen top left corner when switching on from standby.
Usualy, when switching off the STB, the DVB-T tuner is in use; the internal DVB-S2 tuner is not in action.

To recover normal use; I have to power off then on the STB.

PLI 3 is updated almost every day..

I have one USB RTL2832 dongle powered by the internal STB 5V supply.

One small USB HDD with 2 USB connectors to improve power supply is being used.
When supplied directly by the remaining 2 USB ports, that did not worked correctly.

I have installed one USB hub with this own power supply.. But I am not sure the power supply in question is OK for that... Allthought with enough current to supply the HDD in question.

Besides, I could not observe any issue after reboot.. Recordings are OK...

I suspect in such situation with the STB hang, I can't get any crash log, is not it??