This is probably a mono / winforms problem; but:
1. Query area
2. Copy and paste the initial query multiple times (hold down CTRL+V)
SELECT ?s ?p ?o
WHERE {
?s ?p ?o .
} LIMIT 100
3. Hit ctrl + z until you return to the original query
Expect:
It repaints properly and removes text from the display
Actual:
it looks like the keypress events are firing too quickly for the textarea to repaint, and the control ends up rendering:
"SELECT ?s ?p ?o
WHERE {
?s ?p ?o .
} LIMIT 100SELECT ?s ?p ?o
WHERE {
?s ?p ?o .
} LIMIT 100"
until tabs are swapped