$0 Trial period charged at Stripe whether trial period enabled or not with variable pricing

[secretagencyit]

In Test Mode, Stripe is showing transactions for $0 trial periods despite no trial period set up in membership.

To reproduce:

1. Connect to Stripe in Test Mode

2. Create a membership with the following settings:

• Initial Payment: >= $1
• Recurring Subscription: checked
• Billing Amount: >= $1 per 1 months
• Billing Cycle Limit: 0
• Custom Trial: unchecked ( or checked with $0 for the first 0 subscription payments)
• Variable Pricing: Enabled, Min Price >= $1. No Max, No suggested Price

3. Purchase the subscription with a new account.

4. Check your invoices in the Stripe backend admin panel in TEST MODE (Developers toggle in upper right corner).

5. If you see invoices for $0 for trial periods for the new membership, that is the bug.

[secretagencyit]

As a sanity check, I tested a membership with no variable pricing, and no trial period, and it too created a $0 invoice for a trial period in stripe. So the problem may not be with the Variable pricing add-on.

I also disabled the Variable Pricing Plugin. So this is not the culprit after all. This may be a Stripe issue.