Fixing Layout 351 Width Issue in Accordion Interaction

Hey all. Struggling to get the width of Layout 351 when expanded to 100%. On the initial load, it is 100% but when I start interacting between the accordion tabs, the width snaps back to 100rem. I've looked everywhere but still no luck joy on how to change this value. The interaction looks good to me at start width of 5rem and close width of 100%. Any ideas or advice? I could inject a JS override but that's my last resort. Thanks so much.