WiFi drop issue with Clash Of Clans

After starting Clash Of Clans (COC) for several seconds, it shows WiFi drop symbol in the middle of the screen and I can't attack at all. Sometimes, it happens in the middle of attack. I tried to restart the app and the phone many times but the problem wasn't solved. This happened on both WiFi and mobile  internet (4G, 3G, or 2G) but only on specific devices, Redmi 8A in my case. The problem does not appear on my iPhone 5s, iPhone 6, and iPad mini 2.

Using Game Speed Booster fixed the problem. Game Speed Booster is part of MIUI Security app. MIUI is Android-based operating system for MI and Redmi phones. Game Speed Booster improves gamer's experiences by restricting background app sync, maintaining network stability, preventing network switching, boosting CPU usage, improve screen's sensitivity, and more.

I had to start COC from within Game Speed Booster every time to get it boosted.

Useful Apps I'm Using On Samsung Galaxy A10s

Volume Control (by Netroken)

The volume buttons are on the left and the power button is on the right. Every time I press the power button with my thumb, my index finger press the lower volume button accidentally, and it lowers the in-call volume. 

To solve this issue, I use the Volume Control app to lock the in-call volume at its max, which can't be modified by the volume buttons. This app works on non-rooted devices.

AutoStart App Manager (by The Sugar Apps)

Since the Volume Control can't start itself when the system boots, I use this app to auto start it. This app works on non-rooted devices.

I tried AutoStart - No root, BootManager, and Autorun Manager apps, and they started the Volume Control app when I opened them but they didn't start themselves when the phone started. 

Then, I tried Boot Apps and it did start itself and the Volume Control at boot time but it also brought the Volume Control to the foreground.