I too am still having an issue with misaligned slides.
The timing issue i had in earlier version seems to be fixed, but slides are still misaligned.
Each slide past the first seems to indent further by the same amount, so the 6th slide is for all purposes invisible as its indented so far to the right as to completely hide it.
I have 6 slides with 3 lines of text and <br/> as line breaks, just bg colour for now.
I have updated all components/plugins, purged all caches, no theme designer mode.
I have noticed that this happens when my window is maximised, and on resize it appears to fix it.
After resizing, even if i maximize again it appears to align all slides.
Without resize, slides were misaligned even navigating to different slides ahead of timer or that already displayed.
However, if the window is not resized, the issue persists even if the slideshow is left running for X minutes, though i have noticed sometimes it seems to be fixed when i looked at it again, but i believe i must have minized that window or moved it breifly before returning it using windows snap.