I'm attaching a video of the reboot process I performed on Saturday. For the reference, I had exacly same success with a full poweroff and clean boot, except I had to enter my PC boot password in that case.
** Attachment added: "20200321_093326.mp4" https://bugs.launchpad.net/bugs/1854640/+attachment/5340309/+files/20200321_093326.mp4 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1854640 Title: Multiple issues with plymouth-theme-spinner on Lenovo Thinkpad X1 Carbon 6th gen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1854640/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs