Windows Stuck after throwing out fishing rod on Ginger Island during the "Golden Walnut" pop up

[LightningLion]

I am not sure if it was actually a Walnut, because it went away very quickly. Anyway, now I was stuck; no keys did anything and I could only hover over my then present toolbar. My rod just hanging in the air, with no fishing line visible.

Then I just waited until 2 AM, which brought me back to the farm as usual.

 

[LightningLion]

And I don't think that I lost any money after... I was in Year 2 Day 18. It was also my first time on the island, in single player.