Windows and Door Sensor

i ve here a Sensor from Aqara (xiomi).
the receive is very bad. i have open the connections of my zigbee
network and see now this:

is mesh not supported?

The Xiaomi devices are very picky when it comes to choosing a router.
You can try removing the sensor and search for new lights and while the search is running put the door sensor into pairing mode, if you are lucky it now routes through one of the other devices. However, it can as well be that it changes route the next day.
But what do you mean with the receive is bad? There’s a green arrow.

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what i mean? i mean connection = zero

The screenshot looks fine.
Did you try re-pairing it?

yes, but the last connection is over one hour ago…

Did you open/close the door in the last hour?

yes, more as one time

How far away is the device? Did you try my suggestion?

100m
Yes

seems that it works now, at the moment… thx