Shelly Motion weird behaviour

    So, I've setup this motion sensor a 2 weeks ago. All worked fine. I had some lights configured to it so it can togle them on presense in the dark.

    Then last wednesday I started testing with MQTT. All went well. I left it alone for a few hours and then it stopped working.

    I started troubleshooting: restarted the device, it then reconnects to the wifi and is pingable.

    64 bytes from 192.168.0.60: icmp_seq=98 ttl=255 time=688 ms

    64 bytes from 192.168.0.60: icmp_seq=99 ttl=255 time=1938 ms

    64 bytes from 192.168.0.60: icmp_seq=100 ttl=255 time=924 ms

    64 bytes from 192.168.0.60: icmp_seq=101 ttl=255 time=2275 ms

    64 bytes from 192.168.0.60: icmp_seq=102 ttl=255 time=1265 ms

    64 bytes from 192.168.0.60: icmp_seq=103 ttl=255 time=241 ms

    64 bytes from 192.168.0.60: icmp_seq=104 ttl=255 time=1493 ms

    64 bytes from 192.168.0.60: icmp_seq=105 ttl=255 time=478 ms

    64 bytes from 192.168.0.60: icmp_seq=106 ttl=255 time=2238 ms

    64 bytes from 192.168.0.60: icmp_seq=107 ttl=255 time=1223 ms

    64 bytes from 192.168.0.60: icmp_seq=108 ttl=255 time=199 ms

    64 bytes from 192.168.0.60: icmp_seq=109 ttl=255 time=1547 ms

    64 bytes from 192.168.0.60: icmp_seq=110 ttl=255 time=534 ms

    64 bytes from 192.168.0.60: icmp_seq=111 ttl=255 time=1987 ms

    64 bytes from 192.168.0.60: icmp_seq=112 ttl=255 time=974 ms

    X/

    problem is the ping time is pretty high. It starts of normal, but then keeps kliming. And after like 5 to 10 minutes the ping stops and i need to use the pin, hold it 5 seconds for it to restart. then it comes up again for like 10 minutes ...

    So, i reset the device to factory defaults. It gets his DHCP adres and the ping stays normal in the first few minutes. I setup the device to work local (no cloud connection, to MQTT) to minimize traffic. but each time after 5 to 10 minutes, it shuts down.

    I tryed a differt wifi, a different access point, ... . Keeps having the same issue.

    device is on the latest firmware: 20211026-072015/v2.0.3@1dfb9313

    I have 2 other motion sensors working without issues.

    So, I'm wondering, did anyone else encounter this issue?

    Is there a way to drop to a older firmware (just to test)? Where can i find it?

    Or should i look into trying a beta?

    thx.