Choose to cancel one recurring contribution plan, but Civi cancels the other

The bug occurs in the following circumstances:

1. one contact has two recurring payment plans

2. either both plans are "in progress" -or- one is "failed" and the other "in progress".

3. recurring payment plans both related to a currently yearly membership

You may be asking yourself, how did we get here? Well different memberships have different prices, or sometimes prices go up. Civi creates a new recurring plan for the new price. Fair enough. BUT CANCEL THE OLD PLAN and that's where the trouble starts.

In either case, if you choose "Cancel" on the older plan, it actually cancels the NEWER plan erroneously. See attached for examples.