When cutting some seconds from the beginning of an MKV file, the resulting cut file has altered Framerate information: The original was 23.976fps CFR, the cut file is 24.000fps VFR. Shouldn't they be untouched? Using latest Lossless Cut 3.36.0 on Windows 10.

MediaInfo general and video portions (I blanked the some irrelevant values):

Original:
"track": [ { "@type": "General", "UniqueID": ----, "VideoCount": "1", "AudioCount": "1", "MenuCount": "1", "FileExtension": "mkv", "Format": "Matroska", "Format_Version": "4", "FileSize": "14503321545", "Duration": "5960.299", "OverallBitRate_Mode": "VBR", "OverallBitRate": "19466569", "FrameRate": "23.976", "FrameCount": "142904", "StreamSize": "2289020", "IsStreamable": "Yes", "Title": ----, "Movie": ----, "Encoded_Date": ----, "File_Created_Date": ----, "File_Created_Date_Local": ----, "File_Modified_Date": ----, "File_Modified_Date_Local": ----, "Encoded_Application": "mkvmerge v42.0.0 ('Overtime') 64-bit", "Encoded_Library": "libebml v1.3.10 + libmatroska v1.5.2" }, { "@type": "Video", "StreamOrder": "0", "ID": "1", "UniqueID": ----, "Format": "AVC", "Format_Profile": "High", "Format_Level": "4.1", "Format_Settings_CABAC": "Yes", "Format_Settings_RefFrames": "3", "Format_Settings_GOP": "M=3, N=12", "CodecID": "V_MPEG4/ISO/AVC", "Duration": "5960.288000000", "BitRate_Mode": "VBR", "BitRate": "17902528", "BitRate_Maximum": "32294400", "Width": "1920", "Height": "1080", "Stored_Height": "1088", "Sampled_Width": "1920", "Sampled_Height": "1080", "PixelAspectRatio": "1.000", "DisplayAspectRatio": "1.778", "FrameRate_Mode": "CFR", "FrameRate": "23.976", "FrameCount": "142904", "Standard": "NTSC", "ColorSpace": "YUV", "ChromaSubsampling": "4:2:0", "BitDepth": "8", "ScanType": "Progressive", "Delay": "0.000", "StreamSize": "13338028481", "Language": "en", "Default": "Yes", "Forced": "No", "BufferSize": "29999616", "colour_description_present": "Yes", "colour_description_present_Source": "Stream", "colour_range": "Limited", "colour_range_Source": "Stream", "colour_primaries": "BT.709", "colour_primaries_Source": "Stream", "transfer_characteristics": "BT.709", "transfer_characteristics_Source": "Stream", "matrix_coefficients": "BT.709", "matrix_coefficients_Source": "Stream" },

after cutting:
"track": [ { "@type": "General", "UniqueID": ----, "VideoCount": "1", "AudioCount": "1", "MenuCount": "1", "FileExtension": "mkv", "Format": "Matroska", "Format_Version": "4", "FileSize": "14503827608", "Duration": "5949.829", "OverallBitRate_Mode": "VBR", "OverallBitRate": "19501505", "FrameRate": "24.000", "FrameCount": "142904", "StreamSize": "2795083", "IsStreamable": "Yes", "Title": ----, "Movie": ----, "Encoded_Date": ----, "File_Created_Date": ----, "File_Created_Date_Local": ----, "File_Modified_Date": ----, "File_Modified_Date_Local": ----, "Encoded_Application": "Lavf58.45.100", "Encoded_Library": "Lavf58.45.100", "extra": { "ErrorDetectionType": "Per level 1" } }, { "@type": "Video", "StreamOrder": "0", "ID": "1", "UniqueID": ----, "Format": "AVC", "Format_Profile": "High", "Format_Level": "4.1", "Format_Settings_CABAC": "Yes", "Format_Settings_RefFrames": "4", "CodecID": "V_MPEG4/ISO/AVC", "Duration": "5949.819000000", "BitRate_Mode": "VBR", "BitRate": "17902528", "BitRate_Maximum": "37499904", "Width": "1920", "Height": "1080", "Stored_Height": "1088", "Sampled_Width": "1920", "Sampled_Height": "1080", "PixelAspectRatio": "1.000", "DisplayAspectRatio": "1.778", "FrameRate_Mode": "VFR", "FrameRate": "24.000", "FrameRate_Original": "23.976", "FrameCount": "142904", "ColorSpace": "YUV", "ChromaSubsampling": "4:2:0", "BitDepth": "8", "ScanType": "Progressive", "Delay": "0.042", "StreamSize": "13338028481", "Language": "en", "Default": "Yes", "Forced": "No", "BufferSize": "30000000 / 30000000", "colour_description_present": "Yes", "colour_description_present_Source": "Container", "colour_range": "Limited", "colour_range_Source": "Container", "colour_primaries": "BT.709", "colour_primaries_Source": "Container", "transfer_characteristics": "BT.709", "transfer_characteristics_Source": "Container", "matrix_coefficients": "BT.709", "matrix_coefficients_Source": "Container" },