Is there not a way to auto broadcast events every X minutes during the event?

I tried this but it only shows the first broadcast in chat, not the subsequent lines.

"Schedule": {
"enabled": true,
"useRealtime": true,
"broadcast": true,
"entries": [
"3.18:00 pvp PVP time for 6 hours!",
"3.18:30 pvp PVP time for 5.5 hours!",
"3.19:00 pvp PVP time for 5 hours!",
"3.19:30 pvp PVP time for 4.5 hours!",
"3.20:00 pvp PVP time for 4 hours!",
"3.20:30 pvp PVP time for 3.5 hours!",
"3.21:00 pvp PVP time for 3 hours!",
"3.21:30 pvp PVP time for 2.5 hours!",
"3.22:00 pvp PVP time for 2 hours!",
"3.22:30 pvp PVP time for 1.5 hours!",
"3.23:00 pvp PVP time for 1 hours!",
"3.23:30 pvp PVP time for 0.5 hours!",
"3.23:59 default PVP time over!",
"6.18:00 pvp PVP time for 6 hours!",
"6.18:30 pvp PVP time for 5.5 hours!",
"6.19:00 pvp PVP time for 5 hours!",
"6.19:30 pvp PVP time for 4.5 hours!",
"6.20:00 pvp PVP time for 4 hours!",
"6.20:30 pvp PVP time for 3.5 hours!",
"6.21:00 pvp PVP time for 3 hours!",
"6.21:30 pvp PVP time for 2.5 hours!",
"6.22:00 pvp PVP time for 2 hours!",
"6.22:30 pvp PVP time for 1.5 hours!",
"6.23:00 pvp PVP time for 1 hours!",
"6.23:30 pvp PVP time for 0.5 hours!",
"6.23:59 default PVP time over!"
]
},