I think this is part why "art block" is so nebulous to me. I've heard different artists explain it, and I still have never experienced anything on that level.
This doesn't apply to all the artists who have described their art block to me, but so many of them are always on-
You NEEED to work on personal art as you work on comms and I'm so serious. Doesn't matter if you take a day as a break or work on both in a single day, just figure out something. only drawing for other people will kill your drive and motivation!!