System text that was moved has reverted upon reopening the file.
When creating the attached score, I had hoped for a way to place the brackets within the Lyric line rather than needing to add System text. As this function was not available, I used System Text for the four brackets and the verse numbers. This in itself was a mere inconvenience and can be relegated to a suggestion.
The bug I am reporting was encountered upon reopening the score and finding the first two brackets and the verse numbers had reverted to being just above the staff. I had attached them to the top note in the base clef. The work around is simply to drag them back into place. I attempted to recreate the bug, but they now stayed in place.