I remember this issue from a years ago and I thought it was solved. I installed ...8.3007 recently and the problem happened. I don't know if it is a coincidence or not. I'm posting it just in case.
The problem:
'99[non-breaking space]%' was autoprograted as '99%'. The project settings had the 'Use non-breaking space' under Measurements.
Restarting Studio fixed the problem.
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