Audio dropping out during live rehearsal

Hey everyone,

I’m experiencing short audio dropouts during live playback in Logic Pro 11.1.2 on my M4 MacBook Pro (macOS 15.3.2).

The strange thing is:

The dropouts mainly happen early during rehearsals, over time, they become less frequent, and eventually stop completely

I’m using an aggregated device combining a Behringer UMC404HD and a Scarlett 2i2.

This exact setup worked flawlessly on my older Intel MacBook Pro (i9) with an older macOS version. The only major difference is the new Mac and OS version.

This is the setup used for rehearsals, during the show we plan on using the UMC with an Apollo Twin as an aggregate.

I know this isn‘t the best solution, but we are missing outputs and buying an interface with enough outputs isn‘t feasible as we normally don’t need that many outputs during shows.

If nothing else works I might have to just get a bigger interface but I‘d like to avoid that.

Has anyone experienced similar behavior? Any idea what might be causing this?