Different class list than the omnifunc

[FatBoyXPC]

When I compare the list of classes I get with ncm2-phpactor and phpactor's omnifunc class list, I very clearly see different lists. Even stranger, if I trigger the omni func, close the menu, and go back into insert mode to get ncm2 to open up, I see the classes from omnifunc; however, that only happens sometimes (but I was unable to reproduce when creating this issue).

I think screenshots will illustrate this best:

ncm2 completion:

omnifunc: