Sonoff Dongle E Plus as Router: working not stable

[vitoskin]

Hi.
I'm using Zigbee stick v.4 as coordinator and to extend my network I've bought 2 Sonoff dongle e plus.
Both dongles were flashed with CC1352P2_CC2652P_launchpad_router_20221102. After the flashing firmware, everything is ok. I'm able to change the transmission power and see the changes in link quality. Also, I see, that devices are linked to the routers and respond to the actions.
But after some time (probably after one or a few days) the routers start to work unstable: routers may doesn't respond, and linked devices are not working. For example, if I'l try to change the transmission power almost every time I'll get the error "Publish 'set' 'transmit_power' to 'TI Router 1' failed: 'Error: Write 0x00124b0026b8834c/8 genBasic({"4919":{"value":13,"type":40}}, {"sendWhen":"immediate","timeout":10000,"disableResponse":false,"disableRecovery":false,"disableDefaultResponse":true,"direction":0,"srcEndpoint":null,"reservedBits":0,"manufacturerCode":null,"transactionSequenceNumber":null,"writeUndiv":false}) failed (Data request failed with error: 'No network route' (205))'"

The first router is located near the coordinator (there are 2 walls between and the distance is about 4 meters), the second router is located about 40 meters from the first router in line of sight and without obstacles.

Could somebody advise how to solve the issue?

[vitoskin]

Looks like the issue is coming due to a weak signal - if the router couldn't communicate with the coordinator, then Sonoff dongle freezes or stops responding. Restarting by power (switch off, switch on) the device solves the problem.
I've plugged the power of Sonoff via Zigbee wall socket and can schedule the restart of the device by switching off the socket. But after adding the socket the issue was gone, probably, due to extending amount of routers, since the socket serves also as an additional router.