I worked on a worship song called 10,000 reasons and after synchronizing and importing my project to my SD card, the title was constrained to “10” and all the songs after that wouldn’t load and all had those strange numbers that BeatBuddy names their files. I had a brain storm ( or maybe a brain fart) and called the song Ten Thousand Reasons and what do you know, everything is hunk dory.
So the moral of the story, don’t name your songs with numbers.
It is the comma that is the problem, I have 10000 reasons as well but without the comma and have no issues.
Yes, @Psalm40 is right - comma totally breaks the current firmware. Make sure your song names do not contain them. Using non ASCII characters (non-english letters) in song names are very likely to cause issues as well.