Does this only happen with SoloLearn app or with any app? my phone LED only goes red when it's running low on battery, not sure how it goes red in yours though. But if you can be sure that this is strictly on SoloLearn app, then I suggest you to e-mail the developer team [email protected], describe your situation clearly, and don't forget to include a screenshot to illustrate how it is visually.
And be patient waiting for reply, they can get pretty busy at times, but they do check it.
The Dark Hunter
Did you mean the notification counter in SoloLearn app icon or the bell in the app? coz I never see red bell even I get loads of notifications, the colour of the bell is just the same.
Have you sent the e-mail?