When smelting or cooking something in any kind of furnace whether it is Smoker,Blast Furnace or Traditional Furnace. (Most probably happens with smoker and blast furnace). After smelting all the items that you have put in furnace. The indicator arrow stuck at some point. This normally happens when you put a stack of items in smoker or blast furnace.
Thank you for your report!
We're actually already tracking this issue at MCPE-63099, so I will resolve and link this ticket as a duplicate.
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