Nodes disappear from TUI when using some test load

[geonnave]

After some time (about 30 s), all nodes disappear from the TUI, however the node status LED still show they are connected to the gateway.

This only happens when using some test load, e.g. 50%.

[geonnave]

During debugging, we identified that actually, the nodes are crashing.

[geonnave]

I think this issue is outdated, as I haven't observed it anymore in a while.