Large number of greyed-out, completed tasks on iPhone

I registered GoodTask on my Mac Mini and on my iPhone. On the Mac, everything is OK. On my iPhone, there is a large number of completed tasks, displayed "greyed out". These tasks date back to June 2025. If I delete any of them, they just reappear.

I do not see these "greyed out" tasks on icloud.com.

Is this expected? I would prefer to get rid of these completed, greyed out tasks.

Thanks for using GoodTask.

You can tap circle on top right to hide/ show completed tasks. If you want to remove them completely, you can go into Settings - Advanced menu and delete completed tasks. Or you can do it on Reminders app too.

Thanks!