Kontakt is buggy in LMMS (Explanation in Description)

When I open LMMS (latest beta version, RC5,) I can have the Kontakt player running in order to use my sound pack, Lunaris. However, the problem is when I reopen LMMS. Kontakt will load up Lunaris, but all of the samples are turned off, and sometimes (randomly) Kontakt will open with only a small section of the VST UI, like so.


This bug can happen upon reopening the project or loading the VST into LMMS. It's completely random in this case also.
Some addition information is that Lunaris can run on 4 GB of RAM at the minimum. My computer only has 4 GB of RAM, so it may be related to that.

Start by reproducing the issue in LMMS with the Kontakt player and Lunaris: reopen a project or load the VST, then check whether samples are disabled or the VST UI is truncated. Compare behavior on the reported 4 GB RAM setup and determine whether the failure is in LMMS or the plugin. Done means the reproduction cause is identified and a focused fix or documented limitation is established.

Written by the indexing model from the issue text.