Thank you for your suggestion but it defeats the reason why I raised this as an issue in the first place.
If you have to stop and copy and paste the nicely formatted text description into another application on your phone (not that easy) then come back and revise your advert after ending or saving and then paste the words from an external application, you are still having to come out of the ebay app (on phones android or ios) to correct what was correct in the first place. So effectively reformatting your description twice.
I take photos with my phone, probably like most people. Not with my laptop. I upload my photos from my phone, again probably like most people. Once you have ended or saved the listing from the ebay app it scrambles the text with formatting script.
ebay IT have acknowledged this as a bug. This is still an inconvenient bug with the ebay app that I would very much like ebay to fix. It used to be ok, now it isn't.