I had this issue with Flip Boxes v1.5, with 3 boxes flowing into 3 separate rows instead of in a single row. After trying every setting that seemed related with no success, I resorted to inspection of the page, and found I could correct the result by changing one attribute in flipboxes.min.css, changing:
.cfb_wrapper{display:flex;...}
to this:
.cfb_wrapper{display:inline;...}
I tried to implement this change via custom CSS, but it did not take, so I made the change directly to the code, then promptly forgot to report it.
I’ve been holding off on the update to v1.6 until now because I presumed it would still fail, and it does. The code has now been moved to flipboxes-layout.min.css (which also existed in v1.5). Making the same corresponding change there did cause the 3 boxes to flow onto a single row, but in a way that caused the height of each box to be sized smaller than the previous box, with a corresponding effect in the text below. (Cascading up: very strange to look at.)
With no expectation, I tested the CSS suggestion above, to no effect.
I have resolved this for the moment by reverting to v1.5 with my manual change, but would really like to have a permanent solution. The boxes can be seen on the center of this page:
https://sunsetrancheventcenter.com/