I had a similar issue, could start car without ignition key being turned.
Associated with this were frequent fuse failures.
Auto electrician found too many circuits feeding through Multiple fuses so did a bit of rewiring to a separate Set of upgraded fuses.
Stopped all mystery failures and no longer can start without key.
May pay to see if you have any blown fuses, I could lose one with no issues. Can’t remember which ones they were. Age thing
Nigel
