For the Spellcheck function iNotes on Firefox not to split the string when an error results.

On iNotes on a 9.0.1FP9 and a 9.0.1FP10HF48 server.

When accessing using Firefox (tested in Linux and Windows) the spellcheck causes the body of the email to reformat.

Where there is a single line break between lines, the last word of the first line, and first word of the second line move to a line by themselves. There is a short delay after the spellcheck comes up before this appears to happen.

For example:

This is some text on the first line.
It is followed by a second line.

Would be reformatted to:

This is some text on the first
line.
It
is followed by a second line.

Where there is a clean line between paragraphs this does not happen. The space at the end/start seems to be converted to a line break, as when removing the line break a space must be re-added to correct the formatting.

This fault does not appear on IE or Chrome. 

There is a persistent error message in Firefox (in the iNotes console) as follows:
08/06/2018 08:48:13AM A problem has occurred which may have caused the current operation to fail.
08/06/2018 08:48:13AM TypeError: (intermediate value).split is not a function
08/06/2018 08:48:13AM https://server.example.com/iNotes/Forms9.nsf/iNotes/Proxy/?OpenDocument&Form=l_StdPageOperations_Gecko&l=en&gz&CR&MX&TS=20171011T062839,06Z&charset=UTF-8&pt&PresetFields=s_Std;1,s_Tab;1: 12

In this case, it seems that Firefox behaves as to the Spellcheck is calling a string and that is why it is the giving the

'split is not a function'; error.

The customer requests that if we cannot control how Firefox operates the iNotes spellcheck function,

then iNotes should handle the call  more gracefully and compensate for the error by not splitting the string the spellcheck is handling.