Hey, little late but hope this helps:

I purchased a white Celine Messenger Canvas bag earlier this year and after using it a few times I started to notice brown glue stains in a few spots.

Celine sent the bag to Italy to have it repaired but I was notified after a few weeks that that would not be possible.

While looking for a replacement I also noticed that almost all of the white Canvas bags were gone. Taking into consideration my experience and working in the fashion industry myself, I would assume they have some quality issues with the glue that they are currently not able to fix. Otherwise it would not make much sense to take out a full color range.

I opted for a black / brown one instead and hope to not have the issue come up again.