Some DAWs have red mark on track volume bar, if your music is too loud and goes over limit it turns red and then it have to be cleared manually.
Do the same for audio engine not fast enough to do playback in real time. If we starts to drop portions of audio tracks during playback turn audio engine icon red and add some mouse over hint to it.
I spend quite a time trying to fixing recordings (why I have holes in tracks while waves looks okay) but it turned out to be just playback problem. Only problem with Cakewalk I have that it cannot handle much tracks at once. I red forums and youtube and it is problem for long years it will probably not fixed anytime soon, maybe add some "draft" mode to audio engine to do faster mixing like reaper.