If it is only working some times then yes this is most likely a short. However, the issue is most likely on the circuit board of the cluster so having seen this a number of times, I would go ahead and replace it.
Here is a guide on how to replace the cluster on a similar model:
https://youtu.be/_HEC44xENxw
I attached below the process on how to replace the cluster from the manual below. Let us know if you have questions. Thanks
Images (Click to enlarge)
Dec 22, 2020 at 6:47 PM