There is some kind of problem with the text spacing feature. It has been causing issues such as duplication of previous text, deleting text from another part of the page, causing all text to be spaced incorrectly and more.
Rose Campbell commented
Yes! And 2019 has not resolved the issue. I tried to adjust text on one part of the page and it affects other areas of unselected text!! Then, when I save it reverts the file back a few steps and those steps do not show in the undo section!! Some very weird stuff happening.