Just a note, I had this issue appear last summer, in that the odometer numbers weren’t working consistently.
We then had problems starting the van. I pulled the battery and it was actually ‘warm’ to the touch. The battery was shorting, you could smell the acid. When I returned the core, they asked that I leave it outside ‘just in case’.
I replaced the battery and upon putting a new battery in the van, the LCD instrument cluster has been working fine.