I have now tested some more.

If I add two Lplan.Subscribe in the boot event then the mcModule freezes, sometimes mcStudio reports back could not read data but most of the times mcStudio does nothing and when trying to stop the debug session it gives error message Stop Debugging failed.

If i add one Lplan.Subscribe that is published from external system then it does not work, but add one Lplan.Subscribe to a topic that another mcModule is publishing on that works.

So this is what i got.

Two Lplan.Subscribe don't work
One Lplan.Subscribe local topic work
One Lplan.Subscribe external topic don't work

Could someone please test this with the latest firmware? and verify if you get the same result as I.