sometimes Ready-Bit not set in COS Flags after executing a ChannelInit

In case of applicative misbehavior during AR establishment in mailbox service handling, a ChannelInit may result in situation that the COS Flags report 0x6 ("BusOn" and "Running" set).

This is unexpected and wrong as the "Ready"-Bit is not set which makes the whole communication channel unuseable.

The situation can be triggered in e.g. this flow:

• configure Device and register application
• wait for PNS_IF_AR_CHECK_IND and do not send a response
• wait for PNS_IF_USER_ERROR_IND (complaning about missing response) and do not send a response
• now perform a ChannelInit via toolkit functions (do NOT use mailbox)
• as a result, the firmware enters a state where COS Flags report "Running" and "Bus On" but the channel itself is not "Ready" and thus unuseable.