Commit 2a8a98673c13 is in Xenial -proposed, kernel version: Ubuntu-4.4.0-98.121. It looks like you tested with version 4.4.0-62-generic. Can you try testing with the -proposed Xenial kernel:
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.
Another option is to test with the current -updates Artful kernel.
Commit 2a8a98673c13 is in Xenial -proposed, kernel version: Ubuntu- 4.4.0-98. 121. It looks like you tested with version 4.4.0-62-generic. Can you try testing with the -proposed Xenial kernel:
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed.
Another option is to test with the current -updates Artful kernel.