APK sideloaded apps not launching on Quest 3 after v66 update — anyone else facing this?

Hey everyone,

After updating my Quest 3 to v66, I noticed something strange with sideloaded APK apps.
Some of the apps that were working fine before the update now instantly crash or don’t launch at all.

For example, I tested a few sideloaded APK utilities, including this Android scripting tool, and after the update, the APK installs successfully but simply won’t open. No error message, nothing — it just returns back to the Quest UI.

I’m trying to figure out whether:

v66 added new security restrictions on non-Meta APKs,
or there’s a new permission issue,
or I need to reset developer mode settings.
Has anyone else experienced this with other Android apps or tools after the update?
Any fixes or workarounds would be appreciated — I use sideloaded apps a lot for testing.

Thanks in advance.