Game freezes and emits a buzzing sound

Product: Star Wars: Galaxy of Heroes
Platform:Android Phone
What type of device are you experiencing the issue with? Samsung Note 9
OS Version 9
Ally Code: (Find it here: http://bit.ly/AllyCode ) 639-636-975
What type of issue do you have? Gameplay
How often does the bug occur? Occasionally (10% - 49%)
Summarize your bug All game sound is replaced by a buzzing noise. This sound persists even after minimising the app but stops as soon as swgoh is closed. Usually the game will completely freeze at the same time. It must be force closed from this state. It is happening with more frequency since the last update. Previously the freezing only seemed to affect arena and Sith raid. It now occurs in GA too, as well as in some menu screens. For example, accessing the raid screen triggered the crash minutes ago. My client is up to date, I play on a fast and strong WiFi connection and usually close all apps when playing. I believe I have all required assets (saw this as a potential issue in a similar post). When this happens during arena or GA it's very frustrating, and the fact it is occurring more frequently is concerning. Any info / advice would be most welcome! Screenshots of two recent crashes attached. Edit: Further pics added of crashes that occurred within a couple of hours of making the thread.
Steps: How can we find the bug ourselves? Not sure, this happens on a regular basis but I've not been able to find a specific trigger.
Connection Type Wifi
Please select your region Europe
Country Uk

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Screenshots attached.

Edit: Updated with most recent crash (sith raid p2)

Edit 2: One last update to illustrate frequency; crashed again, managed 1 successful sith p2 run before it happened again. This time it crashed during Sion's intro. Have screenshot but as already uploaded 3 images.