Lost excess marble while upgrading:

[Teqx]

I had 455 marble, and was upgrading my hardwood sawmill,
I clicked the upgrade arrow, and my money depleated 100, and my marble 200,
then I clicked the upgrade arrow again without noticing, and it took another 200 marble.
but only upgraded once at this was still upgrading when I clicked.
Not happy.

[Teqx]

Also, didn't get marble back after relogging in.

[Jools]

seems to be a general bug when constructing or upgrading a building, hopefully devs will sort something. Try contacting support see if they can get it back for you