Problem with pausing on FireTV

I have installed Kodi v17.3 on Amazon FireTV v5.2.4.1 with no extra addons.
I am connected to an LG NAS over enet for to watch movies and TV episodes.

The problem I have is temporary pausing for a second or so.

Thinking it may be a network issue, I tested the enet from the back of the FireTV box to the NAS and from the back of the NAS to the FireTV box which averages 5 ms each way. Not sure if that’s good or bad for video?

I also tried the advancedsettings.xml My available memory is 1146mb so I used these settings.

Code:
<advancedsettings>
  <buffermode>1</buffermode>
  <memorysize>20971520</memorysize>
  <readfactor>10</readfactor>
</advancedsettings>

Not sure if I was doing right here but it didn’t make any difference. I then decided to add external storage to the FireTV giving me a total of 3.72 internal and 29.8 external.

I then changed the memorysize to 0. No difference. I am still getting at least two pauses on a 90 minute video.

What am I doing wrong?

I’d appreciate your help. Thanks.