Thanks for the quick reply! Unfortunately, my own form has to be considered proprietary, which limits my ability to share it publicly. However, since it seems you're not aware of any recent upgrades or other issues that would cause XLSForm online not to work generally, it sounds like this is an error with the file itself that I will have to resolve. Thanks.
Feel free to email it to yanokwa@nafundi.com and I won’t share it. The server has had updates recently but I won’t know if it’s related until I see the form.
I've been able to reproduce the problem. Not really sure what it is just yet, but the form conversion spikes the CPU and that's not normal. I'll take a look in a few hours to try to patch it.
The good news is that I've made some changes to the server so that big forms no longer time out.
The bad news is that the server is still very slow to convert and the root cause is the new version of pyxform. It seems to have a performance regression (~20x in my testing).
As an aside, going forward, we'll ship updates to the staging server before they go to everyone. This should give folks a chance to test first and prevent this kind of problem from happening in the future.