New Aston lease question

[Rjscharer]

My lease is entering month 11. I was dumbfounded to find the November payment was $300 less then the previous 10 months.
My dealer can not give me a reason as to why this price drop occurred. Wondering if this has happened in the UK. Perhaps it
was because the Vantage base price was reduced after my basis cost was established in mid-2020? Wouldn’t the residual value
also have to be reduced?

[AstonV]

Why wouldn’t you phone the bank who owns the lease. The dealer doesn’t know. The residual value of your car should be set the day you signed your lease. I didn’t think open end leases were even legal anymore.