I'm not sure how to reproduce unfortunately, but it does happen.
Managed to get it by opening the scanner history right after a TP but couldn't get it again afterwards.
Apparently it is caused by "Without being in an entity and pressing the scan history button causes a nullpointer and game crash." but I can't reproduce that either. Hopefully the logs will help.
[2015-06-05 17:34:19] java.lang.NullPointerException [2015-06-05 17:34:19] at obfuscated.bz.toString(SourceFile:114) [2015-06-05 17:34:19] at obfuscated.aql.a(SourceFile:234) [2015-06-05 17:34:19] at obfuscated.aql.B(SourceFile:422) [2015-06-05 17:34:19] at obfuscated.aql.a(SourceFile:176) [2015-06-05 17:34:19] at obfuscated.aps.a(SourceFile:53) [2015-06-05 17:34:19] at obfuscated.apD.a(SourceFile:70) [2015-06-05 17:34:19] at obfuscated.apP.a(SourceFile:63) [2015-06-05 17:34:19] at obfuscated.apI.a(SourceFile:307) [2015-06-05 17:34:19] at obfuscated.apI.a(SourceFile:197) [2015-06-05 17:34:19] at obfuscated.aqb.a(SourceFile:142) [2015-06-05 17:34:19] at obfuscated.aps.a(SourceFile:53) [2015-06-05 17:34:19] at obfuscated.aps.a(SourceFile:53) [2015-06-05 17:34:19] at obfuscated.aps.a(SourceFile:53) [2015-06-05 17:34:19] at obfuscated.ard.a(SourceFile:96) [2015-06-05 17:34:19] at obfuscated.aqF.a(SourceFile:284) [2015-06-05 17:34:19] at obfuscated.aqJ.a(SourceFile:117) [2015-06-05 17:34:19] at obfuscated.lP.a(SourceFile:203) [2015-06-05 17:34:19] at obfuscated.ma.a(SourceFile:226) [2015-06-05 17:34:19] at obfuscated.hf.d(SourceFile:722) [2015-06-05 17:34:19] at obfuscated.gK.b(SourceFile:594) [2015-06-05 17:34:19] at obfuscated.gK.a(SourceFile:399) [2015-06-05 17:34:19] at obfuscated.aoa.e(SourceFile:781) [2015-06-05 17:34:19] at obfuscated.aoa.a(SourceFile:1183) [2015-06-05 17:34:19] at obfuscated.C.h(SourceFile:2307) [2015-06-05 17:34:19] at obfuscated.JA.run(SourceFile:86) [2015-06-05 17:34:19] at java.lang.Thread.run(Unknown Source)
Full log: