When running mongoimport on a huge file (50+ GB in my case) the progress is displayed incorrectly

2017-01-16T11:55:50.004+0100 connected to: localhost
2017-01-16T11:55:52.993+0100 ####################### testdb.testcollection 52.8GB/18.5MB (291976.6%)
2017-01-16T11:55:55.993+0100 ####################### testdb.testcollection 52.8GB/36.9MB (146839.5%)
2017-01-16T11:55:58.993+0100 ####################### testdb.testcollection 52.8GB/56.3MB (96176.7%)
2017-01-16T11:56:01.996+0100 ####################### testdb.testcollection 52.8GB/75.8MB (71420.9%)
2017-01-16T11:56:04.996+0100 ####################### testdb.testcollection 52.8GB/94.3MB (57346.1%)
2017-01-16T11:56:07.995+0100 ####################### testdb.testcollection 52.8GB/113MB (47925.3%)
2017-01-16T11:56:10.993+0100 ####################### testdb.testcollection 52.8GB/131MB (41419.1%)