Oliver Glasner cannot seem to catch a break right now at Crystal Palace as every positive development seems to be followed by negatives. Over the last few weeks, Crystal Palace looked like the injury struggles were easing as Eberechi Eze returned to action along with Will Hughes. Above these, it seemed Michael Olise was closing in on his return from injury potentially being fit in time to face Nottingham Forest on Saturday. But just as Oliver Glasner got tantalisingly close to being able to name a strong line-up, Palace have been dragged back by more injuries. Sam Johnstone was the first as he…