I've always experienced some form of lag with the app. It seems to worsen with more spaces or groups. This looks like glitchy scrolling, texts not sending or lagging, keyboard entry lagging, glitchy swiping, spaces not opening or opening slowly. Recently I discovered using the microphone occasionally will trigger a flashing screen.
I realized closing and reopening the app can help address many of these issues, but they reappear very quickly.
I am using an iPhone 14 Pro and iPad mini 6 on the iOS 18 developer beta, but I experienced many of these issues without the beta.
It seems I can't attach a video here, but let me know if you'd like an example.