I have had this issue on iPhone for at least 2 years. It has gotten significantly worse with iOS 26 but it has existed on my iPhone and Mac for years. Many others have reported this issue for years on this very forum (Cursor Positioning Issue in Tables within… - Apple Community )
I have also reported the bug to Apple many times using their feedback reporting tool over the last couple of years and it has obviously not been fixed. A couple of weeks ago, it got so bad that I called Apple support to report it over the phone. I sent the support team a video of the cursor bug happening and they logged a diagnostic report from my device while they could literally see the bug happen live while I screen shared my iPhone 17 Pro. Members of the support team told me that they’d get back to me with information from an Apple engineer but they have not reached out in over a week (after they specifically promised to reach out last Wednesday).
This is a super unfortunate experience, as I use the Notes app everyday for work and it’s almost non-functional on iOS 26.1. I appreciate the optimism in this thread suggesting that this problem will be fixed imminently but at this point, I personally wonder how widespread an issue like this has to be for a juggernaut company like Apple to take notice. Two years is a long time to wait for a fix to such an egregious bug, in my opinion.