I have 2 stand alone HD 223 Brightsign units who has been working flawlessly for the past 6 months but out of nowhere of both of the devices the video's started to glitch one after another in a week's notice.
The glitches look like as if the antenna reception is bad.. (see picture)

the project has 2 video's from which 1 video loops and the 2nd video is triggered by GPIO and goes back to main video after that video stops.
I have republished the exact same project back into the microSD card after formatting it and the glitches were gone.
What is causing this problem and how can i prevent this from happening again in the future? I'm using class 10 microSD cards