Few days ago I just installed the app after a really long break.
I am using a local server installed on a raspberry pi b. The raspberry pi is os is not using the desktop interface. Blynk is the only thing running in the background.
Right now, I am using a single device, but I have been running the same configuration before with even more widgets and more devices with no problems long time ago.
The apps is barely responsive and the behavior is was not always like this. It had few moments when it worked fine. I deleted the cache and the data, even reinstalled it twice. It helps for a short time. The plus/minus buttons are barely responsive, but after multiple tape some of them are registered.The smartphone warms up after a while after I keep trying to use the app.
I updated the app last night I think, but the same issues happened on the previous version too.
My smartphone is the s8+ with android 9.0, not a custom ROM, but a Samsung ROM