If you place a glass pane, and then a water bucket on the same block as the glass pane, the water will flow through the glass pane.
Check out the YouTube video of me reproducing this bug: Water flowing through Glass pane bug.
MC-164195
Water flows through glass planes
Resolved
Duplicate
1
Thank you for your report!
We're actually already tracking this issue in MC-127237, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. That means that this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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