Close() method at qlua::data_source

[QApplication]

Добрый день
При закрытии источника данных по свечам кидается исключение

Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>)

Подписка на данные:

2021-10-10 20:03:35.855311 createDataSource TQBR, TATN, TICK size = 36336
2021-10-10 20:03:35.858180 createDataSource TQBR, TATN, M1 size = 5960
2021-10-10 20:03:35.860818 createDataSource TQBR, TATN, M2 size = 5981
2021-10-10 20:03:35.863559 createDataSource TQBR, TATN, M3 size = 5987
2021-10-10 20:03:35.866831 createDataSource TQBR, TATN, M4 size = 5990
2021-10-10 20:03:35.869780 createDataSource TQBR, TATN, M5 size = 5993
2021-10-10 20:03:35.872547 createDataSource TQBR, TATN, M6 size = 5993
2021-10-10 20:03:35.875341 createDataSource TQBR, TATN, M10 size = 5997
2021-10-10 20:03:35.878192 createDataSource TQBR, TATN, M15 size = 5997
2021-10-10 20:03:35.880955 createDataSource TQBR, TATN, M20 size = 5998
2021-10-10 20:03:35.883810 createDataSource TQBR, TATN, M30 size = 5253
2021-10-10 20:03:35.886014 createDataSource TQBR, TATN, H1 size = 4166
2021-10-10 20:03:35.888263 createDataSource TQBR, TATN, H2 size = 3622
2021-10-10 20:03:35.891013 createDataSource TQBR, TATN, H4 size = 3311
2021-10-10 20:03:35.891172 createDataSource TQBR, TATN, D1 size = 3133
2021-10-10 20:03:35.892343 createDataSource TQBR, TATN, W1 size = 1022
2021-10-10 20:03:35.893097 createDataSource TQBR, TATN, MN1 size = 238

Закрытие данных:
<исключение> @ <sec_code> @ <class_code>

2021-10-10 20:14:42.097847 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN TICK true @ TQBR
2021-10-10 20:14:42.097912 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M1 true @ TQBR
2021-10-10 20:14:42.097977 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M2 true @ TQBR
2021-10-10 20:14:42.098041 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M3 true @ TQBR
2021-10-10 20:14:42.098105 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M4 true @ TQBR
2021-10-10 20:14:42.098168 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M5 true @ TQBR
2021-10-10 20:14:42.098231 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M6 true @ TQBR
2021-10-10 20:14:42.098293 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M10 true @ TQBR
2021-10-10 20:14:42.098356 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M15 true @ TQBR
2021-10-10 20:14:42.098420 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M20 true @ TQBR
2021-10-10 20:14:42.098482 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN M30 true @ TQBR
2021-10-10 20:14:42.098545 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN H1 true @ TQBR
2021-10-10 20:14:42.098607 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN H2 true @ TQBR
2021-10-10 20:14:42.098671 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN H4 true @ TQBR
2021-10-10 20:14:42.098734 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN D1 true @ TQBR
2021-10-10 20:14:42.098797 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN W1 true @ TQBR
2021-10-10 20:14:42.098861 runtime_error Luacpp entity get: typecheck failed (Lua type at stack index -1 is nil; content as string: <Oops, got null from Lua when tried to get actual content as string>) @ TATN MN1 true @ TQBR