Hi Stephane,
Thank you for your patience.
We are glad to inform you that the defect regarding the issue of Commenting a collapsed text causes some text missing or crash the edit control has been fixed. You can download the service pack with the fix from the following location:
http://www2.syncfusion.com/Installs/v5.2.0.39/syncfusionessentialstudiosetup.exeUnlock Key:
If you are using any of 5.2.0 versions, you can use the same key for this service pack. If you consider upgrading to this version from prior 5.2 versions, please contact your Syncfusion Sales Representative or mail us to salessupport@syncfusion.com for an unlock key.
Kindly let us know if you need further assistance.
Regards,
Saravanan