courses: safer transactions (fixes #3731)

[Okuro3499]

fixes #3731
test using roboscripts choose this as test device

[strawberrybread]

Ran a robo test using Small Phone, 4.7in/12cm (Arm), Virtual, API Level 32 and it crashed.

java.lang.RuntimeException: Unable to destroy activity {org.ole.planet.myplanet/org.ole.planet.myplanet.ui.dashboard.DashboardActivity}: java.lang.IllegalStateException: no event down from INITIALIZED in component ResourcesFragment{da2eeaf} (38474b7e-32b8-49ca-bec1-b0c68fb5b88e id=0x7f0a022a tag=shelf)

FATAL EXCEPTION: Thread-3
Process: org.ole.planet.myplanet, PID: 9043
java.lang.RuntimeException: Unable to destroy activity {org.ole.planet.myplanet/org.ole.planet.myplanet.ui.dashboard.DashboardActivity}: java.lang.IllegalStateException: no event down from INITIALIZED in component ResourcesFragment{da2eeaf} (38474b7e-32b8-49ca-bec1-b0c68fb5b88e id=0x7f0a022a tag=shelf)

Caused by: java.lang.IllegalStateException: no event down from INITIALIZED in component ResourcesFragment{da2eeaf} (38474b7e-32b8-49ca-bec1-b0c68fb5b88e id=0x7f0a022a tag=shelf)

[ewhang5]

I got the same error message as @strawberrybread