Error when using high frequency trigger

[intchris1]

Problem:
When using any trigger that runs more often than once in 30 seconds, it often fails with this error:

LockManager : Failed to lock trigger DEFAULT.sampleTrigger, reason: WriteError{code=11000, message='E11000 duplicate key error collection: SfoScheduler.quartz_locks index: keyGroup_1_keyName_1_type_1 dup key: { : "DEFAULT", : "sampleTrigger", : "t" }', details={}}

Trigger executes once, then fails with this error, after sometime recovers and runs fine several times, and then fails with the same error again

Here is a sample project: https://github.com/intchris1/quartz-mongodb-reproduce
(Added library to the project because coudn't download repository from bintray)

And there is another issue, I think somehow connected with these locks:
If an application loses connection with MongoDB for several seconds and then gets it back, jobs never get executed again until the application restarts
Unfortunately I don't have a project reproducing this right now, but we have these two issues in production
Both issues encountered when using a single application (not clustered jobstore)