Actually it was an issue with the HTTP sys driver that due to a WIN update package, changed the "Start" value in the WIN registry to enable (value 3) from 4 (disabled) as port 80 was used in the configuration (cringe). The clue began with cache locator delay and time out to form a quorum > although the web app rendered and allowed login any code submitted did not register in obj spawn logs/workspace server logs (also pooled) (set to debug). The request was not being sent plus local access logs remained static. Looked in WIN registry of middle tier server
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP > Start value was 3 (enabled),
Stopped cache locator service on compute machine > on middle tier node, had to reset to 4, bounce the server > started cache locator again on compute node and then re-started middle tier.
I hope this helps someone.
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