Advice on potential problem?

[PeteB62]

A couple of weeks ago I backed the car out of the garage, car fired up first time as normal no problem. Then went to lock everything up, got back in car and had to failed starts. Just sounded like a clunk, with my base knowledge assumed this would be the solenoid for the starter motor. Fired up no problem on third attempt and since then over a couple of weeks as been good as gold ~20-30 starts. Is this something I should worry about, needs urgent replacement or is it one to just keep an eye on?

Car is 2017 V8 Vantage, had it from new, no issues around starting until this event. Battery seems fine.

[LTP]

I have had a very few occasions (maybe 6 - 10 in 6 years) with my 2015 V8V where I've pushed the glass key fully home and....nothing. Withdraw the key and re-insert and the car fired up immediately every time. It's almost as if the immobiliser doesn't recognise the key first time and goes "Nope".

This was not accompanied by any "clunk" noises, so may not be related. Again, may not be related but when I start the car I tend to insert the key and immediately push it fully home in one motion, straight to Position III for 'crank'

[PeteB62]

One more event on cold morning, could this be a sign of key battery needing replacement?
Note, did not notice any clunk this time.