6.1.6 is not maintained. All bug-fixes are currently applied to JUCE 7.
I recommend trying out JUCE 7, as the issue may already be fixed there. If the same issue is still present, then the future fix will be applied to JUCE 7.
The bug exists in 7.0.5 but it looks like TableListBox is undergoing significant change in the develop branch and no longer has an overloaded mouseDown() so hopefully that fixes it