When rendering an encoded image for a second time the image data seems corrupted and an exception is thrown: InvalidOperationException: 'Illegal character.'
When getting the hash code of CFF (Compact Font Format) font`s UnderlineThickness and there is no such value set in the font file the default value should be returned but an exception is thrown: NullReferenceException: 'Object reference not set to an instance of an object.'
When exporting an image with ICCBased color space and the default ImageCompression is changed an exception is thrown: NotSupportedException: 'Not supported colorspace: ICCBased'.
NullReferenceException: 'Object reference not set to an instance of an object.' is thrown on export because the value of TransformMethod property is not obtained.
When decoding the image with a CCITTFaxDecode filter an exception is thrown: NullReferenceException: 'Object reference not set to an instance of an object.'
When trying to convert Image XObject encoded with FlateDecode and with no ColorSpace defined to a DCTDecoded image it is fallbacking to preserve the original FlatDecode filter and the image is not converted.