SSH terminal randomly gets stuck in Alt/Meta state on RDM Linux 2026.3.0.5

Environment

• OS: Fedora Linux 44
• Desktop environment: KDE Plasma
• Remote Desktop Manager: 2026.3.0.5
• Connection type: SSH
• Remote host: Linux
• RDM terminal: built-in SSH terminal

While using an SSH session in RDM, the terminal works normally for some time and then suddenly starts behaving as if the Alt/Meta key is still pressed.
Normal keyboard input is replaced by sequences such as:
^[i
^[n
^[d
^[j
^[s
^[kFor example, typing normal characters results in ESC + character being sent to the remote shell.
At the same time, Ctrl+C stops working correctly. The remote shell continues to behave abnormally and pressing Ctrl+C does not interrupt the current input/process as expected.

Workaround
Pressing the Alt key once immediately restores normal keyboard input.
After pressing Alt, the SSH terminal works normally again without reconnecting the session.
Reproduction / observed behavior

1. Open an SSH session in RDM.
2. Use the terminal normally.
3. After some time, the keyboard input may become corrupted.
4. The terminal starts receiving ESC + character sequences (^[x).
5. Ctrl+C no longer works correctly.
6. Pressing Alt once immediately fixes the problem.

This seems to indicate that RDM is incorrectly retaining or restoring the Alt/Meta modifier state in the SSH terminal.
Please investigate whether this is a regression or a known issue in the 2026.3.x terminal/keyboard handling on Linux.