Fails rarely. Example runs for staking_repro2:

http://nightly.neartest.com/run/2cef4105736ab969470df2751e78fd3f0fc0a81d_200428_035216
http://nightly.neartest.com/run/f625606891dec008a572ca61ec37da500c2a95cd_200428_135923

For staking2:

http://nightly.neartest.com/run/2cef4105736ab969470df2751e78fd3f0fc0a81d_200428_102644

Evidently fails to process one of the staking transactions in time?