Do you have any experience with autos that did not...

It never happens to me but I am growing my autos under a 12/12 light schedule. I saw serval diaries with Autoflowering strains that in fact requires a 12/12 schedule , It is due to the fact that to obtain a potent Autoflowering strain you need to cross a Ruderalis with the auto gene to a Sativa/ Indica or an Hybrid with the genes responsible from the thc production ( ruderalis have very low thc level ) And sometimes the photoperiodic gene can be dominant ( generally in the 3rd generation: F3 ) and that is your case. Just flip to 12/12 and you'll harvest a nice fake autoflower 😊👍