Unlike you I had no more stake rewards since then. They stopped as soon as I got that message: I was getting at least one stake reward per hour.
That's strange.
That's my silk.conf file, maybe that will help
stakegen=1
addnode=162.243.163.103
addnode=62.30.13.24
addnode=slkexplorer.silknetwork.org
addnode=82.73.172.120
addnode=91.220.151.240
addnode=37.228.255.192
addnode=159.203.111.196
addnode=73.130.81.250
addnode=71.115.160.71
addnode=72.190.16.92
addnode=91.220.151.240
addnode=82.73.172.120
addnode=173.76.182.122
addnode=159.203.100.25
addnode=104.238.186.122
addnode=109.193.126.51
addnode=192.40.88.72
addnode=45.63.16.17
addnode=222.5.183.201
addnode=188.126.72.192
addnode=77.244.5.13
addnode=46.83.237.242
addnode=84.193.211.3
addnode=84.195.38.128
addnode=188.220.46.41
addnode=94.68.189.58