I have a workaround, at least in my case, but not a solution. The problem persisted even with ALL plugins except The Events Calendar and Events Calendar Pro deactivated using the Twenty Sixteen themef. With only those two plugins activated, I started to look at settings to see if there was a difference with Woocommerce, Event Tickets and Event Tickets Plus deactivated. I discovered that without the Event Tickets Plugins and Woocommerce in place, that there was a box to place the currency symbol either before or after the price. Please see screenshot below. The currency symbol was blank. When I put a $ sign into the box and indicated that it should be before the price, the symbol appeared correctly.
I updated all the events, reactivated both Event Tickets plugins, and the event prices are rendered properly BUT the problem persists with any new events that I post. Hopefully, this analysis will give you some insight towards fixing this issue and will help others as a temporary fix, but it is very tedious to update every single event.