I think there is no need to open a corresponding Launchpad bug for upstream issues 418 and 422 since they concern issues introduced during the 1.5.1 release which does not have a corresponding package in Ubuntu. This bug is about upgrading from 1.5.0-1.1 directly to 1.5.2.
I have opened a Launchpad bug for each upstream bug:
Launchpad bug for upstream bug 406: URL Parsing broken since VTE update to 0.60 /bugs.launchpad .net/ubuntu/ +source/ tilda/+ bug/1878473
https:/
Launchpad bug for upstream bug 404: Url-parsing cuts on at-sign "@" /bugs.launchpad .net/ubuntu/ +source/ tilda/+ bug/1878474
https:/
Launchpad bug for upstream bug 419: Fullscreen tilda window can appear behind panels /bugs.launchpad .net/ubuntu/ +source/ tilda/+ bug/1878475
https:/
Launchpad bug for upstream bug 420: Close tab confirmation dialog can reappear if canceled /bugs.launchpad .net/ubuntu/ +source/ tilda/+ bug/1878476
https:/
Launchpad bug for upstream bug 421: The switch-page callback is registered multiple times /bugs.launchpad .net/ubuntu/ +source/ tilda/+ bug/1878478
https:/
I think there is no need to open a corresponding Launchpad bug for upstream issues 418 and 422 since they concern issues introduced during the 1.5.1 release which does not have a corresponding package in Ubuntu. This bug is about upgrading from 1.5.0-1.1 directly to 1.5.2.