Smart Serial Comms Error - Since upgrade to 2.9.4

Hi All
I've had to rebuild my machine after an SSD failure, and decided to move into the future.
I installed 2.9.4 and copied in my machine config files, everything worked out an issue initially but with in a few minutes I started getting the following errors
 

The latancy seems ok, running for a long time with glxgears and watching video via youtube and copying larger files

 

I'm running a bit file which might be old, PCW made it up for me at least 4 years ago
7i80db_16_7i76x3D3p.bit

 

The root issue is not sserial related but latency related
(notice that the first error is a watchdog bite)

I would

1. Run a latency test

2. Check the network latency with:

sudo chrt 99 ping -i .001 -q -c 60000 10.10.10.10

or

sudo chrt 99 ping -i .001 -q -c 60000 192.168.1.121

(depending on 7I80 IP address setting)