High RAM usage AC86U

Been running this RT-AC86U for a little over a month now. 1st thing I did was to load Merlin firmware which seems to be running fine. A short while back(maybe a week or so) when I logged on I noticed the RAM usage was way high. Like at 94 to 95% usage. I rebooted the router and the memory usage went down to around 50%.
So today I thought about checking it again and the RAM usage is again back up around the 95% level. A reboot takes it back down to normal.

So I am curious is this...

High RAM usage AC86U