Sometimes the connection is unstable

tower:
E1118 17:18:08.550844 1 proxy.go:152] Failed to upgrade connectionwrite tcp 10.233.90.20:8080->10.233.97.0:61511: write: connection reset by peer

agent:
agent.go:168] Connection error: websocket: bad handshake (Attempt: 18)

Start by examining the connection errors at proxy.go:152 and agent.go:168, using the Tower and agent log messages as the reproduction clues. Trace the websocket upgrade and connection-reset path; the issue does not define a specific fix or completion test, so the cause and expected stable behavior need to be established first.

Written by the indexing model from the issue text.