"Renew" and "Reactivate" buttons have disappeared from some membership plans

The "Renew" and "Reactivate" options have disappeared from some of our membership plans. I've tried to figure out a pattern, or a date when things changed - without success.

Here's our basic setup:
We have set all plans to be able to be renewed one month before expiration, and to be reactivated anytime. All our plans are for 1 year. Some of our plans are single payment plans, and need to be manually renewed or reactivated when they expire. Some of our plans are 4-payment plans, duration 3 months, total number of automatic renewals set to 4. The 4-payment plans expire at the end of one year and the member needs to renew or reactivate.

For the single payment plans, the "Renew" button shows up 1 month before expiration, and the "Reactivate" button shows up after expiration - as they should.

For the 4-payment plans the "Renew" button is not showing up at all.
For the 4-payment plans that have expired recently, the member's page doesn't even show which subscription has just expired, so it doesn't show when it expired, and it doesn't have a "Reactivate" option.

Anyone have any idea what the problem could be?

Thank you for any help you can give!

I assume you used "Total number of occurrences of regular validity/price (0=unlimitted)" to limit the number of renewals for that recurring plan to 4? If that's the case once they hit 4 renewals they can't renew the plan anymore. That's the total number of occurrences of that duration and price that are allowed.

There is no functionality for 1 year duration with installment payments. For that to work you'd need to reset regular_recurrings_used to 0 for their subscription in _cbsubs_subscriptions to allow for 4 payments again; you might be able to do that with CBSubs SQL Actions with something like the below.

Expiration and Deactivation:
I've never used such a usecase so the above is untested and might not work, but would be the only way to try and force installment payment functionality.