Sonoff zigbee wifi bridge, stops working or unreliable

i bought this zigbee bridge. flashed it with Tasmota following this yt tutorial. works great for 2 days with my samsung button and multisensor.
now those samsung devices stop working. i know it’s not samsung’s fault because they were rock solid when paired with the samsung v3 hub.
so what’s the trick to get my zigbee reliable? in tasmota it looks fine but i have no idea why it’s not talking to any of my zigbee devices after 2+ days. restarted sonoff too.