Picture.URL Fail

Hi!
I have been experiencing crashes when trying to upload images ( base64 ) via picture.url . As follows:
...Picture.Url := 'data:image/png;base64,iVBORw0KGg...';
It happens that IW or CG to treat the string, adds extra characters in the data line ( , : / ) invalidating functionality.
I have fix for this problem?
Grateful.
[XE8 - CG2.6 - IW14.0.41]
I have been experiencing crashes when trying to upload images ( base64 ) via picture.url . As follows:
...Picture.Url := 'data:image/png;base64,iVBORw0KGg...';
It happens that IW or CG to treat the string, adds extra characters in the data line ( , : / ) invalidating functionality.
I have fix for this problem?
Grateful.
[XE8 - CG2.6 - IW14.0.41]