This has been an issue on Fire TVs for a while. I had tried many different ways to fix it but only recently was able to fix it by following these instructions:
Alternative setup: for use with version of Stalker that is included with Kodi only.
Set your EPG remote URL to hxxps://papiao.is/main/EPG/mac/00:1A:78:XX:XX:XX/donation/XXXXXXXXX/fname/NFPSF2
Leave all the value headers in the URL (do not remove the words mac, donation, or fname leave them there, only change the X's)
Replace all the XX's with your Mac or Donation
NFPSF1=English only
NFPSF2=English offset one hour, for those having issues.
NFPSF3=All Languages
NFPSF4=All anguages offset one hour, for those having issues.
For IPTV66, replace "papiao" with IKS66
I had to change the 00:1A:78: to 00:1A:79: to match my MAC address and use NFPSF2 to get the one hour fixed.