Transcript cuts of the last word when editing the transcript

I would usually let the video to get auto-transcribe, and it would usually takes a lot of things wrong in the desktop app (as a sidenote, the mobile app seems to be more accurate with trascription). I would then go to change the transcript as I am watching back the footage, so getting each caption into the edit mode, editing and clicking away is very quick (I am trying to be fast with this part, because it is very tedious). 

Sometimes, I would that upon clicking away, the last word (or sometimes the first word) of my transcript would go away. I do not understand why it happens, if I have just typed it. I would go back and add it again. so I effectively did this work TWICE already.

That as I am happy with the transcript, I would go ahead and generate captions from it. As I am watching the video back with captions, I would see that the first and last words are missing AGAIN, so I have to do the same work with missing words three times, and typing them manually three times. I would really appreciate if the software would not reset my MANUAL work 

and on the side note, please do not insert random punctuation. I would prefer not punctuation, that hundreds of random periods in a single sentence. If you are using AI to analyse the captions, could it at least analyse the text as a whole to identify where the sentences end. and break up the captions at the end of a sentence