Yes, a video freeze there is a known issue in 10.14.4 and .5, though rarer than the crashing before the fix in 10.14.4. This should be fixed in the next game update, but there is no estimate yet for when that will be.
Another person who reported this was playing co-op; the game would still respond to input, so he could pass his turn, just not update the video. There was no problem on the other Mac, so they swapped who was hosting. You may be able to quicksave and restart the game (repeatedly) to get through, or if you don't mind missing a little experience, one person reported sneaking through to the end of the area to avoid the combat / crashing.
