Blockly stops running when making changes

[Padster]

I've noticed this behavior when adding a new z-wave device or If I've been editing Blockly scripts.

Basically the scripts appear to stop running reboots of my RP3 don't help. Gradually after quite some time they will start to function but even then only partially.

For example I have a script that looks for any of my lights to be on - if they are It sets a variable to 'On' and if all are off it sets it to 'Off'. When this problem happens whether the lights are on of off the variable doesn't get updates. Then it will start to change the variable to On when a light is turned on but won't set it to off when I turn the light off.

Eventually all the scripts start working again as they should.

Anyone any ideas as to what's happening?