@grame/libfaust: Embind found a leaked C++ instance vector<int> - memory leak?

[dxinteractive]

I've recently tried using @grame/libfaust version 1.3.1 - I've found that the examples and also my usages of the code throw the following warning in latest Chrome on MacOS after a short time running:

Embind found a leaked C++ instance vector<int> <0x14eabb0>.
We'll free it automatically in this case, but this functionality is not reliable across various environments.
Make sure to invoke .delete() manually once you're done with the instance instead.
Originally allocated

Is this something to be concerned about?