Looks, that Teltonika developers not tested on all RUT955 devices this 3.2.5 bootloader.
I uploaded 3.2.5 bootloader to my RUT955, waited wery long time 10+ minutes, only LAN 3 blinking.
I`m looking on all this coments and understand that this bootloader are RUT955 killer :(
Don`t update until this was fixed.
Warranty is over....
This device is needed to install after some hours ....., but it is broken with poor bootloader.