I'm new to Festool. I'm running an RO90 attached to CT26 in auto mode. Every so often the DC will quit for about 1 to 1/2 second then restart. The RO90 continues to run during this brief time. I'm hooked up directly to 20 amp circuit, so there shouldn't be any line issues. Im using the Sander continuously to remove paint, and this issue with the DC will happen sometimes after 3 minutes of use or not until 10 min of use. There's no rhyme or reason to when/if it happens. The whole system is less than 2 weeks old. Is this normal?