[BUG] /usage progress bars render for ~1s then disappear in PyCharm terminal (both engines); fine in system terminal

What's wrong

Running /usage in PyCharm's integrated terminal shows the usage progress bars for about a second, then they disappear. The same Claude Code version on the same machine renders them correctly in a separate system terminal (GNOME Terminal).

• Reproduces in both PyCharm terminal engines, Classic and Reworked.
• Reproduces with the terminal tool window maximised, so it is not the short-window layout problem from #61685.
• Reproduces on the latest PyCharm (2026.2.3). The IDE upgrade that fixed #82916 for one commenter does not help here.

Steps to reproduce

1. Open PyCharm's integrated terminal (either engine) and maximise the tool window.
2. Type claude in the terminal (launched manually, not via the Claude Code plugin's button), then run /usage.
3. The bars appear briefly, then disappear.

Expected

Bars stay visible, as in a system terminal.

Environment

• Claude Code 2.1.283
• PyCharm 2026.2.3 (Build #PY-262.10968.92), JetBrains Runtime 25.0.4+1-b508.27
• Claude Code JetBrains plugin 0.1.14-beta
• Ubuntu 24.04.4 LTS, GNOME Shell 46.0, X11 toolkit
• Shell: bash

Related

• #48801: same symptom ("briefly shows the stats but instantly shows a broken stats") in the VS Code terminal on 2.1.109. Closed as a duplicate of #51616, fixed in 2.1.119, now locked.
• #81885, #82916: other Claude Code TUI rendering bugs in JetBrains terminals.