i10 – does not ignite sporadic / Start problem

I have a problem with the Freudin’s vehicle, sometimes it just doesn’t ignite. Sympthom -> Starter rotates well and willingly, but not the touch of an ignition. Suspicion: a) read coil b) key transponder (replacement key, same problem) To a) I know from VW that weakens the coil and you have to give it time, i.e. ignition and some sec wait, then start first = unfortunately does not help here. Now the real question How does the I10 behave normally? Our model: 1) Zün dschlüssel pure / ignition on -> ABS lights up and then goes out of i.o. –> immobilizer lights up further (yellow key) 2) Start attempt –> continues to light a) does not ignite = lamp whiter on b) ignites = lamp goes out in that moment When does the lamp normally go out, even if the ignition is activated / starter rotates or is the permanent light already an indication that the key is not detected?