Merge remote-tracking branch 'origin/develop' into settings-changed

* origin/develop: (306 commits)
  fallback if shadows aren't defined
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1 files changed, 8 insertions, 1 deletions

diff --git a/src/services/promise_interval/promise_interval.js b/src/services/promise_interval/promise_interval.js
index cf17970d..0c0a66a0 100644
--- a/src/services/promise_interval/promise_interval.js
+++ b/src/services/promise_interval/promise_interval.js
@@ -10,7 +10,14 @@ export const promiseInterval = (promiseCall, interval) => {
   let timeout = null
 
   const func = () => {
-    promiseCall().finally(() => {
+    const promise = promiseCall()
+    // something unexpected happened and promiseCall did not
+    // return a promise, abort the loop.
+    if (!(promise && promise.finally)) {
+      console.warn('promiseInterval: promise call did not return a promise, stopping interval.')
+      return
+    }
+    promise.finally(() => {
       if (stopped) return
       timeout = window.setTimeout(func, interval)
     })