MobileAds.initialize freezes UI thread

[shefich]

[REQUIRED] Step 1: Describe your environment

• Unity version: 2022.3.54, 2022.3.55
• Google Mobile Ads Unity plugin version: Google Mobile Ads Unity Plugin v9.4.0 and 9.5.0
• Plugin installation method: https://github.com/googleads/googleads-mobile-unity/releases/tag/v9.5.0) and 9.4.0
• Any specific devices issue occurs on: Samsung a5
• Mediation ad networks used, and their versions: tried even with disableMediationAdapterInitialization

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

Have problems with "MobileAds.initialize". It freezes main thread for 5-6 seconds.
I have "Optimize initialization" turned "true" in Google Mobile Ads settings in project.
The problem appeared several weeks ago.

Relevant Code:

// TODO(you): code here to reproduce the problem

[shefich]

Update: happens on all my projects.
Google Mobile Ads 9.1.0, 9.2.0
Unity 2022.3.31, 2023.3.28

[NVentimiglia]

@shefich

The Samsung a5 was released over 10 years ago and may not have the power for a modern game. Have you seen this issue on any more modern devices?