I have found the major issue, I have missing stream type "4097" before channel reference ..
for example: in file bouquetmakerxtream.channels.xml containing
<?xml version="1.0" encoding="utf-8"?>
<channels>
<channel id="AMC (HD)">:0:1:7981:2C7:600:E080000:0:0:0:http%3a//example.m3u8</channel><!-- AMC -->
but userbouquet contaning:
#SERVICE 4097:0:1:7981:2C7:600:E080000:0:0:0:http%3A//10.8.5.100%3A8000/live/test/test/96.ts:AMC
after adding "4097" to all channel references, EPG loaded for all channels
<?xml version="1.0" encoding="utf-8"?>
<channels>
<channel id="AMC (HD)">4097:0:1:7981:2C7:600:E080000:0:0:0:http%3a//example.m3u8</channel><!-- AMC -->