Shunting unload jobs not spawning

[RadPowr]

I have 5 flatcars with steel. When i use "refresh jobs", an error appers in console (ArgumentOutOfRangeException: Specified argument was out of the range of valid values).
I want to note that when I brought these сars and handed over the job, the shunting unload job was generated (because max 9 flatcars on L - track can be placed). But if you move away from GF and come back again, or accept and cancel the job, then the SU job will not be generated again if refresh.
Also, the presence of these cars prevents the SL job generation with other cars

[fauxnik]

I will need a log file from a session in which this occurs (the more isolated, the better) in order to debug this.

[RadPowr]

Log.zip
I got the log, but it's not for those session (on GF). The last session was similar, but now there are coal wagons on the SM that do not want to be unloaded. :) I do not know why the log file is so large (145 Mb), I zip-archived it.

PS Found this exception:
ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: index
at System.Linq.Enumerable.ElementAt[TSource] (System.Collections.Generic.IEnumerable'1[T] source, System.Int32 index) [0x0007b] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at RollingStockOwnership.Extensions.IEnumerable_Extensions.ElementAtRandom[T] (System.Collections.Generic.IEnumerable'1[T] enumerable, System.Random rng) [0x0000d] in <16c0930bc9224252afa071e9817f4180>:0
at RollingStockOwnership.ProceduralJobsController+d__7.MoveNext () [0x01df4] in <16c0930bc9224252afa071e9817f4180>:0
at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00026] in <85d1d3e7744a4a47b5f51883bf40bba2>:0

(Filename: <351e49e2a5bf4fd6beabb458ce2255f3> Line: 0)