LTR390 cuts values

ESPHome
1

I installed an LTR390 outdoor and expose it to direct sunlight. The top values seems to be cutted at 52.428,6 lx:

image

This is my config:

- platform: ltr390
    update_interval: 10s
    light:
      name: "Licht"
      filters:
        - sliding_window_moving_average:
            window_size: 12
            send_every: 6

I tried changing gain/resolution, but this leads to significant different lx values without changes in sunlight intensity. Anyone an idea how to prevent value cutting?