Xibo Ubuntu 18.04 & 19 . Linux Player with 4/8GB memory crash?

I install Ubuntu 18 and 19 .with Lenovo tiny m73/ m93.(total 10 units.)
all have the same problem. Gnome-Shell crash,
18.04 = crash and back to desktop with sound play at background.
19 = crash Black screen.
I found out the memory xibo-player use keeps increasing. after it hit max memory (4gb/8gb install)
than gnome will crash.(4gb is around 5 hours then crash)
the xibo-player was playing 10 1080 mp4 files .loop.
any ideas?

Hi Weixi_You. The development team are indeed aware of this behaviour, which is currently being investigated. Thank you for providing the details about this issue and apologies for any inconvenience.

Many Thanks.