It seems that when using Sentry, promises break in ClojureScript advanced compilation. I didn't investigate too deep yet, but seems as if, for example in .then and p/then calls, the argument is somehow a promise and not the value.
Sentry documentation has instructions for disabling it's automatic patching of Promises, which seems to help: https://docs.sentry.io/platforms/react-native/troubleshooting/#disable-auto-patching
(sentry/init
(->js {...
;; Seems to break promises in CLJS advanced build
:patchGlobalPromise false
...