I feel that 10 minutes of refreshing is almost always enough time to snag an LL for any ride that has “sold out” for the day or to get an earlier time than what I already hold.
What I end up using instead of the My Plan feature are these steps:
Navigate to the LL times in the app
Scroll to the ride I want to stalk
Tap into it
Tap back
Tap at the top of my screen and it will scroll to the top
Pull to refresh. After the refresh it will auto scroll down to your last selection.
Repeat steps 5 & 6
I am not entirely sure that step 5 will work in Android like it does on iPhone. Tapping at the top of the screen is a sort of standard “scroll to the top of the list” functionality.
The My Plans are probably easier but since I am often doing this stuff on demand and changing around what I am hunting for, I find this process sufficient.