PP Express renews a day earlier than other gateways when you set a trial with the Sub Delay Add On

[MaryOJob]

Describe the bug
When checking out with PP Express on a level that a trial is set using the Sub Delay Add On, the next payment date is a day before, meanwhile, it's the next day for Stripe and Authorize.net

To Reproduce
Steps to reproduce the behavior:

1. Activate 'Subscription Delay Add On'
2. Set up a level with a '7-day trial'
3. Checkout with 'PayPal Express' and note the next payment date
4. Checkout with 'Stripe or Authorize' and note the next payment date
5. See the difference

Expected behavior
The next payment date should be the same day for all the gateways

Isolating the problem (mark completed items with an [x]):

• I have deactivated other plugins and confirmed this bug occurs when only Paid Memberships Pro plugin and the Subscription delay Add On is active.
• This bug happens with a default WordPress theme active, or Memberlite.
• I can reproduce this bug consistently using the steps above.

WordPress Environment

``` WordPress Version 5.8.1 PHP Version 7.4.24 PMPro Version 2.6.3 Subscription Delay Add On Version 0.5.4 ```

[hbcondo]

Hi, could @sc0ttkclark / the PMP team please give an update on this issue? It was reported 2 years ago but is still an issue today.

[sc0ttkclark]

I'm sorry, I'm no longer involved with development of PMPro itself. But if there's anything that needs to be done from the Pods side then I can always address that since Pods remains active. Since this isn't Pods related, I probably can't help here.

[hbcondo]

Thank you for letting us know. I just re-created this issue in the pmpro-subscriptions-delay add-on repo in hopes it will get resolved there:

strangerstudios/pmpro-subscription-delays#44