No, I basically had it from the start. Except back then we had no insight into the downtime checks at all and I hadn’t set up uptime robot yet. I found out about the issue months later when I did set up uptime robot and saw the same things you’re describing. At the time someone from Storj was kind enough to send me the stats the satellites had for uptime checks and they showed I had missed about 10% of them without the node ever being offline. Now we can get those stats from the API ourselves.
I read your withdrawn post for removal and noticed you mentioned an Asus router. I have the Asus RT-AC5300. Please also check the logs of your router, I had lots of lines that logs were omitted because of repeated errors. Which I think were related to my issue. But not entirely sure.