Input instructions through the jumpers stalled

1. Description
When you enter commands on the server accessed through the jump-board, you feel a lag，WindTerm 2.6.1 no such problem，whether caused by the Agent Forwarding feature

2. Version
WindTerm 2.7.0 Prerelease 1

Reproduce the lag when entering commands on a server accessed through the jump-board using WindTerm 2.7.0 Prerelease 1, and compare the same workflow with WindTerm 2.6.1. Check whether Agent Forwarding changes the behavior; done means identifying whether that feature causes the reported input delay and documenting the result.

Written by the indexing model from the issue text.