RDP v2026.3.15.0 - keyboard shortcuts for tab navigion (previous, next) sometimes are not functional

Hello.
RDP v2026.3.15.0, Windows 11 26H2, windows updates 2026-10, simple xml workspace.
Sometimes are not functional defined keyboard shortcuts for switching between session tabs (previous and next).
I have defined CTRL+ALT+PAGEUP (previous tab), CTRL+ALT+PAGEDOWN (next tab). There is no collision with other software keyboard shortcuts.
Nothing solves the trouble (for example change keyboard shortcuts), sometimes help computer rebooting.

Thank you.
Best regards,
Ales