I have used this app for many years. Sadly looking at new alternatives – gTasks for Google Tasks Review

Support hasn’t helped even after reaching out a couple times. It creates multiples of the same task on iPhone when syncing. It does not sync correctly. Deleted it and re-installed several times. Still didn’t sync correctly. There are a lot of other apps to choose from. Before getting to a place where you have hours invested and hundreds of tasks...like me...choose a more reliable app.
Review by curbappeal2007 on gTasks for Google Tasks.