Applying any transition ONLY applies default transition

Excalibur 1.1.4 | Premiere 15.4.0 | Mac OS 10.15.7

I am encountering an issue where when I attempt to apply a transition with Excalibur, Premiere will only apply my default transition.

This is happening with:

•Wipe

•Iris Round

I read on the forums that this could be an issue with some FilmImpact transitions, but these are the defaults within Premiere. I haven't added any plugins to my stack or updated Premiere recently, so I'm a bit confused. Would appreciate any insight. Thanks.

[Edit] Issue resolved by updating to beta version