S26R2ZBTPF becomes unavailable ZHA

I bought several S26R2ZBTPF to act as smart plugs and routers.

Problem is the become unavailable and I need to manual re conect them to my network.

I am at 39 devices.

Using a ZBBridge flashed with tasmota.

Hard wired devices I have the following:

4 zbmin (sonoff)

6 S26R2ZBTPF (sonoff)

1 DIN rail power meter (tuya)

the rest are buttons - temp and battery sensors

Most of the remain available my issue is with the S26R2ZBTPF

any ideas on a fix?