They usually cut the ending letter off if it's a possible release candidate. And I believe also a digit as well. Release build numbers are usually shorter (13E5214d > 13E521 if we were to use the latest build as an example)
I am on the Public Beta road, so I can't test this myself yet but.
Can can you check if animations still break when sending messages via the Messages app or by Quick Replying in landscape?
Thanks.