mqtt hub app keeps crashing when broadcasting + feature request

[B3rt]

When i use the broadcast button the app crashes at approx 40~70%.
21b63c98-1ba2-4428-abf2-af0215a7f38c (created when crashed)
2ed1bed2-6b0b-4b49-9cb9-dee0f54b82b0 (created after the crash)

Tried it several times, I suspect the app runs out of memory or something...
MQTT Hub 93.45 MB

I have also a feature request.
Please make a setting or default option that newly added devices are default NOT enabled....
Now all new devices are always enabled, this is unwanted, some devices are already in homeassitant (I use it for HA connection) and devices from HA are then also added/broadcasted to HA again.

So it would be nice that all new devices are disabled and that yu have to enable them yourself.....