I noticed that after the second engine is starting (first engine already is started) the message "BLEED APU VLV OPEN" disappears from EICAS which I saw in a movie that it does not, till the APU is turned OFF. I realized this because I forgot to shut the APU off and I found that in flight.. As long as that message stays on EICAS is a reminder that it has to be turned off.
(After start, if you turn OFF left engine the message appears, if you turn OFF only the right engine it does not. I suppose the logic is implemented depending by engine 1 condition. In the video below it does not seem to depend). Can this be checked (or perhaps is explainable)?