Reconfiguring inputs by config file doesn't work right anymore

[Bloodsurfer]

I'm using config files in \\recalbox\share\system\configs\retroarch\nes<rom>.nes.cfg mostly to swap the A and B buttons for some games and to reconfigure the hotkey buttons, so I can fast forward by pressing hotkey + R2 for example.

This was working fine in older versions before 6.0, it is no longer working correctly in 6.1.1.

The config files look like this:

input_player1_a_btn = 1
input_player1_b_btn = 0

input_hold_fast_forward_btn = 9
input_rewind_btn = 8
input_shader_next_btn = 7
input_shader_prev_btn = 6

menu_swap_ok_cancel_buttons = "false"

What happens now when I press hotkey + R2 is, it does not only fast forward but also switches the shaders. So it is performing its original function as well as the new function I assigned via the config file.

Has anything been changed regarding this feature, do I have to change something in the config files?