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Description of problem:
When disconnecting a session by exit command and clicking a Reset button in cockpit (web console) terminal, a prompt is not returned and any input cannot be entered. Attached the screencast.

Version-Release number of selected component (if applicable):
cockpit-224.2-1.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Login to web console (cockpit) and click Terminal tab
2. Run "exit" command
3. Click "Reset" button

Actual results:
Prompt is not returned, and cannot enter anything

Expected results:
Prompt is returned

Additional info:
- This issue is NOT reproducible in cockpit-211.3-1.el8 (RHEL 8.2), so this could be a regression.
- This issue is also reproducible in cockpit-230-1.fc33.x86_64 (Fedora 33).

Created attachment 1728981 [details]
screencast when the issue reproduces

Thanks for the report! I confirm that with 2323/current master. So this is indeed a regression.

Indeed this is regression due to https://github.com/cockpit-project/cockpit/pull/12948/commits/29d74ff61e9d1661e56b18cc8ec8803b1df02de8

Looking into this.

Upstream PR: https://github.com/cockpit-project/cockpit/pull/14928

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (cockpit bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:1684