Master weight suddenly changed (but the values are correct)

I’ve got a really strange issue. I noticed that suddenly the weight of my Light master changed, but all the values are correct. I not only shows it in Glyphs, it also heavier fatter. What could have happened here? Am I overseeing something?

This is the Masters settings in the Info window. On the left the current version, on the right the previous version:

This is the Exports settings in the Info window. On the left the current version, on the right the previous version. On the left you see the heavier Light master:

Here so see the issue in action. In the font window I choose the Light, but it shows a heavier weight?

Any ideas what might be causing this problem?

Thanks in advance (on a Sunday)
René

Fixed it: I changed the Axes Coordinates weight to 300 and then back to 100. Then everything was fine!

So this might be a bug @GeorgSeifert