Hi; I've just tested it out; I confirm it fixes the issue I was met with. Thank you for your swift action!
Your example is not consistent for space character between continueous lines. This was a mistake on my end. I wanted the examples to have the same expected result, and didn't notice the discrepancy. I confirm there would be a slight difference because of it, as you highlighted. The fix has also been pushed. Thank you for helping so fast! I will get back here when I have time to look into it.
.PO filter bug: display issue when a msgctxt spans several lines