TypeError: E.displayEvents(...) is undefined

[raffis]

Describe the bug

TypeError: E.displayEvents(...) is undefinedballoon.c8358d1f1e722a0cf03e.js:45:44893
    displayEventsInfiniteScroll https://fqdn/balloon.c8358d1f1e722a0cf03e.js:45
    dispatch https://fqdn/balloon.c8358d1f1e722a0cf03e.js:39
    handle https://fqdn/balloon.c8358d1f1e722a0cf03e.js:39

To Reproduce

Somehow I was able to hit the error above. Check stacktrace.

Expected behavior

No such TypeError.

Environment

• web-client version: v3.2.4
• balloon server version: [e.g. v2.4.2]
• Deployed as: [e.g. docker,deb package,tar,compiled manually]
• client os: Linux Mint
• browser: Firefox

Additional context

Add any other context about the problem here.

[pixtron]

As displayEvents and displayEventsInfiniteScroll are both properties of the balloon object (in the minified source referred to as E). displayEvents shouldn't be undefined.

The bug is so far not reproducible.

[raffis]

Today I've enountered:

TypeError: E.last is null balloon.b4a15eaa81d6beb159e9.js:45:57829
    _treeDblclick https://fqdn/balloon.b4a15eaa81d6beb159e9.js:45
    dispatch https://fqdn/balloon.b4a15eaa81d6beb159e9.js:39
    handle https://fqdn/balloon.b4a15eaa81d6beb159e9.js:39

After removing many nodes and opened the trash. But I did that before as well, this only happened after 5 times the same action. Probably race condition.