Weird warning with `P4estMesh`

I got these two warnings a few times now:
```
┌ Warning: skipping callee #_#793 (called by nothing) due to UndefRefError()
└ @ LoweredCodeUtils C:\Users\Erik\.julia\packages\LoweredCodeUtils\TH1qS\src\signatures.jl:279
┌ Warning: skipping callee #_#798 (called by nothing) due to UndefRefError()
└ @ LoweredCodeUtils C:\Users\Erik\.julia\packages\LoweredCodeUtils\TH1qS\src\signatures.jl:279
```

I am not sure if this happens only with `P4estMesh`, I don't know if this is only on my system, I have no idea where this comes from, and I can't really reproduce it (it just happens sometimes).
Can this have something to do with the finalizers of the `P4estMesh`?