Updated known problems

FAQ.md

@@ -80,6 +80,7 @@ Related questions:
 * ~~Encryption with YubiKey results into an infinite loop. This seems to be caused by a [bug in OpenKeychain](https://github.com/open-keychain/open-keychain/issues/2507).~~
 * Scrolling to an internally linked location in original messages does not work. This can't be fixed because the original message view is contained in a scrolling view.
 * A preview of a message text doesn't (always) appear on Samsung watches because [setLocalOnly](https://developer.android.com/reference/androidx/core/app/NotificationCompat.Builder.html#setLocalOnly(boolean)) seem to be ignored. Message preview texts are known to be displayed correctly on Pebble 2, Fitbit Charge 3, and Mi band 3 wearables. See also [this FAQ](#user-content-faq126).
+* A [bug in Android 6.0](https://issuetracker.google.com/issues/37068143) causes a crash with *... Invalid offset: ... Valid range is ...* when text is selected and tapping outside of the selected text. This bug has been fixed in Android 6.0.1.
 
 ## Planned features