You might want to report this to Zapier. Unfortunately, Asana doesn’t manage their Zapier integration. Maybe we can convince them to take it over?
There are a few bugs in it right now. For example, you can’t create a task with multiple projects tied in the current Zapier configuration. It’s just a bug and tough for Zapier to put all of the resources behind fixing them all. Asana’s team is far larger and would likely do a better job keeping their integration working and bug-free.
Zapier told me that if we can convince Asana to take over the integration that would be super helpful and would likely result in more frequent updates and fixes.