[BUG] Drop down menu continuously flickers

this problem occupy when menu is out of screen.

menu will try to offset it’s position in order to display all information but I dont know why it will try to back to original position as well.

So it repeat “fix” position and “back” to position.

This problem will not cause any error, but annoying.

By way, I am Mac 10.10.5 .

Hi Smallee,

I have assigned this issue to a member of our support staff, who will post here if they have any questions for you. In meantime, please get system information for your Mac. You can find this in Apple menu under About This Mac… copy information there, minus Serial Number, and paste it here for us. Thank you!

Thanks very much


Hi Smallee,

I was not able to reproduce this on our Macbook Pro running 10.10.5 as shown here:

Can you identify, from this image, anything I might be doing differently from you?

Can you list some precise repro steps?

Also, can you provide requested information on your system specs?

This is information is needed to identify source of your bug.

Thanks for your cooperation,


Please see image below
If the “Menu’s Length” not out of whole editor window, it is OK.
You can see last element in menu is “Time Limit”.

But if the “Menu’s Length” out of window, then :

Means that if “Time Limit” element cant display, menu will try to change it position.

Also, My Resolution is 1440x900 , 15’ Monitor

This is what I see on our end:

Since we cannot reproduce issue here, please send your system specs:

For example:

  1. MacBook Pro (Retina, 15-inch, Late 2013) OSX
  2. Yosemite 10.10.5
  3. PROCESSOR: 2.3GHz Intel Core i7
  5. GeForce GT 750 M 2048 MB

1.MacBook Pro (Retina, 15-inch, Late 2011) OSX

2.Yosemite 10.10.5

3.PROCESSOR: 2.4 GHz Intel Core i7

4.MEMORY: 16 GB 1600 MHz DDR3

5.AMD Radeon HD 6770M 1024 MB

Hi smallee,

I’ve used information that you’ve provided to enter following bug report: JIRA [UE-22984]. Should this issue be resolved in a future version of Engine, we will notify you with an update to this post.

Thanks for bringing this to our attention.

Same bug here;

Sometimes it flickers, sometimes it just steadily shows a clone of deepest dropdown (in pic this case).

UE 4.10 and 4.10.1;
Windows 8.1 x64
Nvidia 750M
i7-3630QM 2.4GHz
16GB ram

A bug report has been filed but this issue has not been corrected. When it is we will add an update to answer below telling what version of Engine contains correction.

I have similar problem on Win 10-64 and in addition in some other places of interface.
Blink dropdown menu “Material” in Set Material node and in dropdown menu “Variable Type”.

UE 4.18

I’m having this issue: UE4 Mac Bug - Album on Imgur on UE4 4.23 on a MacBook Pro 15" MacOS 10.14.6 (18G95) (Mojave) and that happens on every dropdown menu in editor.

It only happens on Mac monitor (unplugged from an external monitor).

Edit → Editor Preferences → Disable Tick of “Enable Window Animations”

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