Metrics change when export the font as OTF

Hello everyone!
I’m having trouble exporting my font as a .otf file. The metrics are being scaled, and some individual characters as well (characters that contain components).
Do you know what the problem might be and what the solution is?

This is what the .otf looks like when I open it again in Glyphs, and these are the metrics before and after:

Thank you for helping me!

Please go to font info > Other and set font type to default.

Thank you, Georg!