BE98 Pro issues

Finally got cable a few days ago after years on DSL and needed a good router to go with it, so I got the BE98 Pro. I'm noticing weird issues with ethernet connections. Everything seems like it's working, but there are random drops like it just cuts for a few seconds and comes back causing a site to load excessively slow now and then. Then it started cutting when streaming from a PC to another device (both wired).

I tried a couple cables even though I knew everything was working prior to replacing a DSL modem with this router, but it keeps happening randomly. It could be smooth for a half hour or an hour, then suddenly 5 minutes of freezing on the video. and yes, I've watched the videos before without incident. I switched the streaming box to wifi while the PC is still wired and it seems to work perfectly this way. I don't get it. If I can't trust the ethernet ports, I need to get something else. I have all the game consoles wired to it as well. I'm just not gaming this week to really test those thoroughly.