@faz808 if you create a new map and don't scroll or click existing one's it will be fine. It's a workaround but it works. I think it happens if you remove images that are placed in maps or if a map gets copied it gets curupted sometimes.
Thanks for the report @spikey, it looks like there was a similar string-related issue fixed for 2.15.0 but it's not quite the same as this one. This issue is specific to strReplace. I've verified the issue and we'll have this fixed in the next patch.