Unfortunately, I pretty much had exactly the same experience. The first time I encountered it in Q4 2023, I was added to a support ticket and received an email a few weeks later saying that it had been resolved with no other info. When I ran into the same thing in January during our next billing cycle, I made a call or two to support and realized that we were headed down the same path before deciding it wasn't worth the effort of having to reexplain the issue to a half-dozen different support agents before finally convincing one that there was a problem. I ultimately abandoned the recurring sales receipts and started duplicating successfully processed one-offs and updating for client and billing cycle as needed.
Maybe newly created ones would work, but I determined that recurring sales receipts created before October 2023 were rotten (for our account at least) and I just don't have the time or patience to set up new ones only to have them not work or eventually fail. I would have welcomed any kind of feedback - you're doing something wrong, the functionality has changed, or this batch of your recurring sales receipts simply aren't going to work moving forward - but I've never had any success establishing that kind of dialog.
Wish I had a better answer for you, but best of luck!
