backend/native: Don't warn when there is no render node
Instead log a debug message. This fixes an issue similar to #2381 (closed), where a system may have a card node, but no render node, in which case we'd log a warning, causing test failures.
Instead log a debug message. This fixes an issue similar to #2381 (closed), where a system may have a card node, but no render node, in which case we'd log a warning, causing test failures.