From your screenshot i can tell that rendering hasn't stopped yet, it still in GI precomp phase. Usually GI precalculation takes significantly more time in texture baking than in regular rendering. That is expected. You can try to switch secondary solver in performance tab from UHD cache to path tracing or none and render should start almost without delay.
BTW, next time you'll take screenshot of VFB, do it with stats tab active, please - that's where all useful information is written.