This has been happening for a few months. A while ago I reset my phone and it stopped happening. I thought it was originally Greenify causing it, but after reinstalling OpenFit today, the issue immediately came back. Oddly enough it also causes Bluetooth to disconnect sometimes. (It may or may not also be the cause of my screen taking quite long to come on after pressing the unlock button)
EDIT: Can confirm it also causes my lockscreen issue.
This has been happening for a few months. A while ago I reset my phone and it stopped happening. I thought it was originally Greenify causing it, but after reinstalling OpenFit today, the issue immediately came back. Oddly enough it also causes Bluetooth to disconnect sometimes. (It may or may not also be the cause of my screen taking quite long to come on after pressing the unlock button)
EDIT: Can confirm it also causes my lockscreen issue.