just ran into this ourselves. long story short, you need to wait for at least 4 HOURS after “confirming and starting” your rollout.
you can double check this by looking at the obb version getting pulled down to your device with the adb(.exe) tool.
you can find most of the details in your [FONT=Courier New]Install_xyz-Android-abc.{bat,sh} file. but, basically look for your obb version like this:
adb.exe shell ls -lR /sdcard/Android/obb/
and you should see something like this:
. . .
/sdcard/Android/obb/com.YourCompany.GameName:
. . .
-rw-rw---- 1 u0_a369 sdcard_rw 1772412884 2020-09-03 09:32 main.46.com.YourCompany.GameName.obb
. . .
note the “store version number” (seen here as “46”).
keep looking at this until you finally see the newer obb version getting installed to your device.
again, it seems to take up to 4 HOURS to see this finally getting installed to the devices. i’m guessing this is presumably to give developers/publishers time to undo any “release to production” for whatever reason.