Will modification of configuration via the GUI Configuration Utility break existing connections?

I have read that load sys conf on command line will break existing connections.

it seems okay here (i.e. not breaking). i am running 11.5.1.

Will the same thing occur if the conf is modified, or simply just reloaded, via the GUI Configuration Utility?

i tested deleting configuration via tmsh. the existing connection still survives.

is there reload configuration option in gui?