cant weld glass shards to make glass sheets anymore

[RedbeardRum]

If this is a feature, my apologies - I haven't been playing too often recently.

Glass shards can no longer be welded into sheets of glass. These shards can be obtained by breaking a glass window.

If this is intended, please consider that this was a creative and interesting method to escape emergencies before (almost always related to building teleporters, now in the space diner).