Cursor Jump While Editing

I am having an infuriating problem with the iOS app. I just tried uninstalling, rebooting my phone (iPhone 8, iOS 15.4.1), and reinstalling the app, and it did not help. The problem is that as I am typing, after every few words, it undoes what I just typed. It also simultaneously jumps to the bottom of the note. Sometimes it immediately jumps back up to where my cursor was before I started typing and sometimes it stays at the bottom and I have to scroll back up. The only way to get it to save anything I type is to hit the back arrow or the button to hide the keyboard, but I have to do it very quickly after every couple of words because if I type 4-5 words it is too late and it deletes them. And then I have to scroll back up to the top (if it jumped) before I can try again.

It seems to be only happening on some of my notes, but they are ones I need to use frequently. I tried copying and pasting the entire note into a new blank note and the problem started happening again after a few minutes. I took a video of the behavior that I could share if that helps.

I have had the same problem on and off for at least the last 4 years (I know because I emailed your support about it before) but it was not as severe, because I could usually type more like 10 words instead of 2.

Expected

Cursor shouldn't be jumping around and keep the position where the typing happens.

Observed

When it's a long text or more than one page, cursor can jump between pages.

I found a closed issue: #888

And a similar Android issue: https://github.com/Automattic/simplenote-android/issues/647

Not sure are this is the same or related.

Reproduced

Start by reproducing the cursor and scroll behavior on the reported iPhone 8, iOS 15.4.1, Simplenote 4.47 setup using a long note, then compare the behavior with closed issue #888 and Android issue #647. Done means typing no longer deletes recent text or moves the cursor away from its editing position.