I also had an issue where I would tap on a text field and it would not gain focus for a few seconds. Sometimes, when it did gain focus, incorrect data would even be entered.

In my case, it was just a symptomatic treatment, so I don't think it will be of much help, but I'll describe the process below.

My app has a tab view, and fortunately the search field was on the leftmost screen that appears when the app starts up, so I changed it to have the default focus, and things improved.

My app doesn't use threads or queues, but it seemed like these were being hindered by some factor, so I wanted to stimulate the system.

I don't know what the cause of the problem is, but I'm happy that it's been fixed for now.

I think it's a bug.