timeIntervalSinceReferenceDate crash

[odyssey1357]

Hello. I am using SalesForce SDK 3.0 in my app. While my application usage I got some feedbacks about crash at "application becomes active" event. I got a little log from BugSense:

-[__NSCFString timeIntervalSinceReferenceDate]: unrecognized selector sent to instance
/----------------------------------------------/
0 CoreFoundation + 130
1 libobjc.A.dylib objc_exception_throw + 38
2 CoreFoundation + 202
3 CoreFoundation + 706
4 CoreFoundation CF_forwarding_prep_0 + 24
5 CoreFoundation + 44
6 MyApp +[SFSecurityLockout inactivityExpired] + 100
7 MyApp +[SFSecurityLockout validateTimer] + 60
8 MyApp -[SalesforceSDKManager handleAppForeground:] + 1060
/----------------------------------------------_/

P.S. I got a plist file with UserDefaults from one of my app users. I found this key-value pair:
timer.lastactivity
Мария
I know "timer.lastactivity" must keep date value, but it keeps string. My app doesn't use UserDefaults value by key "timer.lastactivity".

What's wrong? How can it be fixed.
Thanks for reply.

[khawkins]

That's...very strange. The value that's set for timer.lastactivity should always be a date, the getting and setting of which is fully encapsulated by the SFInactivityTimerCenter class.

Do you have a reproduction scenario for this? And can you tell me how you originated the Mobile SDK into your app (forceios, the distribution repo binaries, etc.)?

[khawkins]

In the absence of further information, I can't reproduce this bug. Feel free to reopen if you can provide a reproduction case.

[ClaudeSutterlin]

For what it's worth, we're experiencing this issue as well. Upwards of 1000 occurrences a day. I'll report back if I find any information to assist in debugging.