This may have been a deliberate choice, but I think it is wrong behavior to have Invizible pass through (allowed, in case of firewall) traffic to the network when tor is not running and "Route all traffic through tor" is checked.
The VPN options allow setting a kill-switch to ensure network traffic is routed. However, accidentally tapping the tor checkbox (thus turning it off) is enough to deanonymize app traffic. This may result in unnecessary accidents. It would probably be better to warn user if tor is turned off and "Route all traffic through tor" option is checked. This would be more in line with the intentions of the kill-switch.