Phantom Front End instances are being counted and billed

[OferR]

Following the change to 'App Engine max_idle_instances setting will apply per-version starting May 24, 2022', I have migrated all traffic to a single version and removed 3 other versions.

My settings are (for all current and deleted versions):

min_idle_instances = 1

max_idle_instances = 1

The Console's Instances Count show a normal behavior. 

However, hours are counted and billed as if there are some 4 extra instances running at all times.

I have disabled and re-enables the application.

When disabled, no hours are counted. When re-enabled, the same issue persists.

I cannot easily re-deploy, as I will have to catch up with all changes of the past 2 years.

Help anyone?

Thanks in advance

[OferR]

My bad...

The old default version was a F1 class. 

The new default (and only) version is F4 class.

Question answered...