Sorry, that was most likely fixed in 1.2.11 version of DSpellCheck plugin, it was released slightly prior this Notepad++ release but sadly wasn't included, most likely because plugin manager still hasn't updated it's list.
You may download this version here:
Or just wait for a new Notepad++ version release.
Sorry for your inconvenience.
Sign up for the SourceForge newsletter:
You seem to have CSS turned off.
Please don't fill out this field.