I have checked this further.

When I do a line return to make a clear line in the middle of a load of text and then select a new colour and continue typing, the following text also changes colour. The action of changing text colour removes a line break. See below where I typed the word red in the middle of a block of text. I can now no longer change the colour below back to black

 

Testing the change of the colour of the font in the middle of a text block.

Testing the change of the colour of the font in the middle of a text block.

red Testing the change of the colour of the font in the middle of a text block.

                             

 

    

Any Ideas how I can avoid this?